WO2023232513A1 - Use of a laundry composition comprising microcapsules to improve the drape and/or resilience of a fabric - Google Patents
Use of a laundry composition comprising microcapsules to improve the drape and/or resilience of a fabric Download PDFInfo
- Publication number
- WO2023232513A1 WO2023232513A1 PCT/EP2023/063566 EP2023063566W WO2023232513A1 WO 2023232513 A1 WO2023232513 A1 WO 2023232513A1 EP 2023063566 W EP2023063566 W EP 2023063566W WO 2023232513 A1 WO2023232513 A1 WO 2023232513A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- microcapsules
- fabric
- poly
- microcapsule
- laundry
- Prior art date
Links
- 239000003094 microcapsule Substances 0.000 title claims abstract description 131
- 239000000203 mixture Substances 0.000 title claims abstract description 107
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- WXMKPNITSTVMEF-UHFFFAOYSA-M sodium benzoate Chemical compound [Na+].[O-]C(=O)C1=CC=CC=C1 WXMKPNITSTVMEF-UHFFFAOYSA-M 0.000 description 1
- 239000004299 sodium benzoate Substances 0.000 description 1
- 235000010234 sodium benzoate Nutrition 0.000 description 1
- 239000004317 sodium nitrate Substances 0.000 description 1
- 235000010344 sodium nitrate Nutrition 0.000 description 1
- 239000001488 sodium phosphate Substances 0.000 description 1
- 229910000162 sodium phosphate Inorganic materials 0.000 description 1
- QUCDWLYKDRVKMI-UHFFFAOYSA-M sodium;3,4-dimethylbenzenesulfonate Chemical compound [Na+].CC1=CC=C(S([O-])(=O)=O)C=C1C QUCDWLYKDRVKMI-UHFFFAOYSA-M 0.000 description 1
- 238000001694 spray drying Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229940071117 starch glycolate Drugs 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 239000000375 suspending agent Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 239000006188 syrup Substances 0.000 description 1
- 235000020357 syrup Nutrition 0.000 description 1
- 229920002258 tannic acid Polymers 0.000 description 1
- LRBQNJMCXXYXIU-NRMVVENXSA-N tannic acid Chemical compound OC1=C(O)C(O)=CC(C(=O)OC=2C(=C(O)C=C(C=2)C(=O)OC[C@@H]2[C@H]([C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)O2)OC(=O)C=2C=C(OC(=O)C=3C=C(O)C(O)=C(O)C=3)C(O)=C(O)C=2)O)=C1 LRBQNJMCXXYXIU-NRMVVENXSA-N 0.000 description 1
- 235000015523 tannic acid Nutrition 0.000 description 1
- 229940033123 tannic acid Drugs 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- 229960002622 triacetin Drugs 0.000 description 1
- LADGBHLMCUINGV-UHFFFAOYSA-N tricaprin Chemical compound CCCCCCCCCC(=O)OCC(OC(=O)CCCCCCCCC)COC(=O)CCCCCCCCC LADGBHLMCUINGV-UHFFFAOYSA-N 0.000 description 1
- 235000013769 triethyl citrate Nutrition 0.000 description 1
- ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical compound OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 0.000 description 1
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- OXQKEKGBFMQTML-KVTDHHQDSA-N volemitol Chemical compound OC[C@@H](O)[C@@H](O)C(O)[C@H](O)[C@H](O)CO OXQKEKGBFMQTML-KVTDHHQDSA-N 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
- 229940100445 wheat starch Drugs 0.000 description 1
- UHVMMEOXYDMDKI-JKYCWFKZSA-L zinc;1-(5-cyanopyridin-2-yl)-3-[(1s,2s)-2-(6-fluoro-2-hydroxy-3-propanoylphenyl)cyclopropyl]urea;diacetate Chemical compound [Zn+2].CC([O-])=O.CC([O-])=O.CCC(=O)C1=CC=C(F)C([C@H]2[C@H](C2)NC(=O)NC=2N=CC(=CC=2)C#N)=C1O UHVMMEOXYDMDKI-JKYCWFKZSA-L 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/0005—Other compounding ingredients characterised by their effect
- C11D3/001—Softening compositions
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D17/00—Detergent materials or soaps characterised by their shape or physical properties
- C11D17/0039—Coated compositions or coated components in the compositions, (micro)capsules
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/16—Organic compounds
- C11D3/20—Organic compounds containing oxygen
- C11D3/22—Carbohydrates or derivatives thereof
- C11D3/222—Natural or synthetic polysaccharides, e.g. cellulose, starch, gum, alginic acid or cyclodextrin
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/50—Perfumes
- C11D3/502—Protected perfumes
- C11D3/505—Protected perfumes encapsulated or adsorbed on a carrier, e.g. zeolite or clay
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D2111/00—Cleaning compositions characterised by the objects to be cleaned; Cleaning compositions characterised by non-standard cleaning or washing processes
- C11D2111/10—Objects to be cleaned
- C11D2111/12—Soft surfaces, e.g. textile
Definitions
- the present invention is in the field of laundry compositions, in particular laundry compositions for improving the drape or resilience of a fabric. of the Invention
- Drape is an assessment of how a fabric hangs under its own weight.
- Resilience is the ability of a fiber to spring back to its natural position after folding, creasing or deformation.
- ingredients have been added to laundry products to improve the drape and/or resilience of fabrics.
- the addition of ingredients to a laundry composition has the drawback of increased complexity in formulation, increased cost and ingredients which may not meet the environmental credentials desired by the consumers.
- Microcapsules are used in various laundry applications, to deliver active materials to fabrics. Microcapsules are known to provide various benefits, such as delayed release of protection of the active material against other ingredients in the laundry composition. Conventional microcapsules typically have a microcapsule wall formed of a synthetic polymer such as a melamine formaldehyde polymer or polyacrylate.
- a laundry composition comprising microcapsules to improve the drape and/or resilience of a fabric, wherein the microcapsules comprise: a) a microcapsule wall comprising a bio polymer; and b) ionic crosslinking agent.
- laundry composition it is herein understood to mean a consumer product suitable for use in a laundry process.
- laundry compositions include liquid laundry detergents, laundry detergent powders, fabric conditioners, ancillary laundry compositions such as scent boosters and fabric spray compositions.
- microcapsule composition it is herein understood to mean the composition comprising microcapsules which is added to a laundry composition.
- the microcapsule composition may comprise only microcapsules or may be in the form of a slurry comprising microcapsules.
- microcapsule it is herein understood to mean the microcapsule (wall and core) i.e. , without a solvent or slurry.
- the laundry products of the present invention comprise microcapsules.
- the microcapsules may simply be provided as microcapsules but preferably are provided in a microcapsule composition comprising microcapsules in a slurry.
- the microcapsules comprise a microcapsule core comprising an active ingredient and microcapsule wall encapsulating the core.
- the microcapsule wall comprises a wall polymer and a crosslinking agent.
- the microcapsules comprise 10 wt.% to 98 wt.% core materials, 1 wt.% to 20 wt.% wall polymer and optionally 0.2 wt.% to 6 wt.% crosslinking agent.
- microcapsules may be prepared by any suitable process including those exemplary processes described here.
- the microcapsule wall may also be referred to as the microcapsule shell.
- the microcapsule wall comprises a bio polymer.
- Bio polymers are natural polymers produced by the cells of living organisms and the derivatives of natural polymers, i.e. polymers derived from bio polymers.
- suitable bio polymers include: lignin, polysaccharides, proteins and nucleic acids.
- the microcapsule wall preferably comprises proteins, polysaccharides and mixtures thereof.
- the biopolymer may be treated by various processes to provide derivatives, including but not limited to hydrolysis, condensation, functionalising such as ethoxylating, crosslinking, etc.
- the microcapsule wall materials are preferably in an aqueous solution.
- the microcapsule wall preferably comprises 20 wt.% to 100 wt.% protein, polysaccharide or combinations thereof, more preferably 30 wt.% to 98 wt.%, more preferably 35 wt.% to 95 wt.%, and most preferably 65 wt.% to 90 wt.% by weight of the microcapsule wall.
- polypeptide or “protein” is a linear organic polymer composed of amino acid residues bonded together in a chain, forming part of (or the whole of) a protein molecule.
- Polypeptide or “protein” as used herein means a natural polypeptide, polypeptide derivative, and/or modified polypeptide.
- the polypeptide may exhibit an average molecular weight of from 1 ,000 Da to 40,000,000 Da, preferably greater than 10,000 Da, more preferably, 100,000 Da, most preferably greater than 1,000,000 Da and preferably less than 3,000,000 Da.
- Suitable proteins for use in this invention include whey proteins, plant proteins and gelatine.
- the plant proteins are used.
- Suitable preferred proteins include proteins selected from: pea, potato proteins, brown rice, white rice, wheat, egg, barley, pumpkin seed, oat, almond, whey, casein, silk, gelatin, algae, rye, spelt, gluten, rapeseed, sunflower, corn, soybean, bean, chickpea, lentil, lupin, peanut, alfalfa, hemp, proteins resulting from fermentation, proteins from food waste and combinations thereof.
- Particularly preferred proteins include proteins selected from chickpea, pea proteins, potato proteins, brown rice proteins, white rice proteins, wheat proteins, barley proteins, pumpkin seed proteins, oat proteins, almond proteins, and combinations thereof. This includes derivatives of the aforementioned proteins.
- whey protein refers to the protein contained in whey, a dairy liquid obtained as a supernatant of curds when milk or a dairy liquid containing milk components, is processed into cheese curd to obtain a cheese-making curd as a semisolid.
- Whey protein is generally understood in principle to include the globular proteins b-lactoglobulin and a-lactalbumin at various ratios such as 1: 1 to 5: 1 (e.g., 2: 1). It may also include lower amounts of serum albumin, immunoglobulin and other globulins.
- the term whey protein is also intended to include partially or completely modified or denatured whey proteins. Purified b-lactoglobulin and/or a- lactalbumin polypeptides may also be used in preparation of microcapsules of this invention.
- Gelatin refers to a mixture of proteins produced by partial hydrolysis of collagen extracted from the skin, bones, and connective tissues of animals.
- Gelatin can be derived from any type of collagen, such as collagen type I, II, III, or IV.
- Such proteins are characterized by including Gly- Xaa-Yaa triplets wherein Gly is the amino acid glycine and Xaa and Yaa can be the same or different and can be any known amino acid. At least 40% of the amino acids are preferably present in the form of consecutive Gly-Xaa-Yaa triplets.
- a preferred class of proteins are plant proteins.
- Plant proteins are proteins that accumulate in various plant tissues.
- Preferred plant proteins can be classified into two classes: seed or grain proteins and vegetable proteins.
- Seed/grain proteins are a set of proteins that accumulate to high levels in seeds/grains during the late stages of seed/grain development, whereas vegetable proteins are proteins that accumulate in vegetative tissues such as leaves, stems and, depending on plant species, tubers.
- seed/grain/legumes storage proteins are proteins from: soya, lupine, pea, chickpea, alfalfa, horse bean, lentil, and haricot bean; from oilseed plants such as colza, cottonseed and sunflower; from cereals like wheat, maize, barley, malt, oats, rye and rice (e.g., brown rice protein), or a combination thereof.
- plant protein is intended to include a plant protein isolate, plant protein concentrate, or a combination thereof. Plant protein isolates and concentrates are generally understood to be composed of several proteins. For example, pea protein isolates and concentrates may include legumin, vicilin and convicilin proteins. Similarly, brown rice protein isolates may include albumin, globulin and glutelin proteins.
- plant protein is also intended to include a partially or completely modified or denatured plant storage protein. Individual polypeptides (e.g., legumin, vicilin, convicilin, albumin, globulin or glutelin) may also be used in preparation of microcapsules of this invention.
- a native protein maybe preferred.
- the process may include a step of denaturing the protein by pH adjustment, heat, or adding a chaotropic agent to the oil-in-water emulsion or to the protein before adding to the oil-in-water emulsion.
- Denaturation is a process in which proteins (polypeptides) lose the quaternary structure, tertiary structure, and secondary structure present in their native state, by application of a denaturation condition. During denaturation, proteins change their conformational structure by unfolding, thereby making amine and hydroxyl groups available for crosslinking (such as crosslinking with polyisocyanate) to form a microcapsule wall.
- Exemplary conditions for protein denaturation include, but are not limited to, radiation, exposure to heat or cold, changes in pH with an acid or base, exposure to denaturing agents such as detergents, inorganic salt, organic solvent (e.g., alcohol, ethyl acetate, and chloroform), urea, or other chaotropic agents, or mechanical stress including shear.
- denaturing agents such as detergents, inorganic salt, organic solvent (e.g., alcohol, ethyl acetate, and chloroform), urea, or other chaotropic agents, or mechanical stress including shear.
- Exemplary chaotropic agents are guanidine salts (e.g., guanidine hydrochloride and guanidine carbonate), urea, polysorbate, sodium benzoate, vanillin, o-cresol, phenol, propanol, formamide, ethanol, fructose, ammonium sulfate, ammonium chloride, ammonium nitrate, ammonium phosphate, potassium sulfate, potassium chloride, potassium iodide, potassium nitrate, potassium phosphate, sodium sulfate, sodium chloride, sodium bromide, sodium nitrate, sodium phosphate, guanidine thiocyanate, xylose, glycerol, benzyl alcohol, ethyl acetate, triton X-100, ethyl acetate, cetyltrimethylammonium halide, acetone, sodium dodecyl sulfate (SDS), hydrochloric acid,
- the protein is denatured with a chaotropic agent so that 20 wt. % to 100 wt.% preferably 40 wt. % to 100 wt. %, more preferably 60 wt.% to 100 wt.%, most preferably 90 wt.% to 100 wt.% of the protein used in the preparation of the microcapsules is denatured.
- the protein used in the microcapsule can also be derivatized or modified (e.g., derivatized or chemically modified).
- the protein can be modified by covalently attaching sugars, lipids, cofactors, peptides, or other chemical groups including phosphate, acetate, methyl, and other natural or unnatural molecule.
- Polysaccharides are a class of carbohydrates comprising multiple monosaccharide units. “Polysaccharide” as used herein means a natural polysaccharide, polysaccharide derivative, and/or modified polysacharide. Suitable polysaccharides maybe selected from the group consisting of fibres, starch, sugar alcohols, sugars and mixtures thereof.
- suitable fibres include: particular cellulose, cellulose derivatives such as hydroxyethyl cellulose, in particular quaternized hydroxyethyl cellulose, carboxymethylcellulose (CMC) and microcrystalline cellulose (MCC), hemicelluloses, lichenin, chitin, chitosan, lignin, xanthan, plant fibers, in particular cereal fibers, potato fibers, apple fibers, citrus fibers, bamboo fibers, extracted sugar beet fibers; oat fibers and soluble dietary fibers, in particular inulin, especially native inulin, highly soluble inulin, granulated inulin, high performance inulin, pectins, alginates, agar, carrageenan, gum arabic (Senegal type, Seyal type), konjac gum, gellan gum, curdlan (paramylon), guar gum, locust bean gum, xanthan gum, raffinose, xylose, polydextrose and
- suitable starches include starch from: wheat, potatoes, corn, rice, tapioca and oats, modified starch, and starch derivatives, e.g., dextrins or maltodextrins, in particular dextrins and maltodextrins from wheat, potatoes, corn, rice, pea, chickpea and oats, oligosaccharides, in particular oligofructose.
- Preferred starches are selected from: corn starch, potato starch, rye starch, wheat starch, barley starch, oat starch, rice starch, pea starch, chickpea starch, tapioca starch, and mixtures thereof.
- Suitable sugar alcohols include: sorbitol, mannitol, isomalt, maltitol, maltilol syrup, lactitol, xylitol, erythritol.
- Suitable sugar includes: glucose.
- polysaccharides include: gum Arabic, dextrins and maltodextrins are particularly preferred.
- the polysaccharide used in the microcapsule can also be derivatized or modified (e.g., derivatized or chemically modified).
- the protein can be modified by covalently attaching sugars, lipids, cofactors, peptides, or other chemical groups including phosphate, acetate, methyl, and other natural or unnatural molecule.
- suitable polysaccharide derivatives include: starch glycolate, carboxymethyl starch, hydroxyalkyl cellulose and crosslinked modified cellulose.
- microcapsules as described herein may optionally comprise additional polymers in the microcapsule walls.
- additional polymers may include: a sol-gel polymer (e.g., silica), polyacrylate, polyacrylamide, poly(acrylate-co-acrylamide), polyurea, polyurethane, starch, gelatin and gum Arabic, poly(melamine-formaldehyde), poly(urea-formaldehyde), and combinations thereof.
- a sol-gel polymer e.g., silica
- polyacrylate e.g., polyacrylamide, poly(acrylate-co-acrylamide), polyurea, polyurethane, starch, gelatin and gum Arabic
- poly(melamine-formaldehyde) poly(urea-formaldehyde)
- the microcapsule wall polymers consist essentially of proteins, polysaccharides, or combinations thereof.
- the microcapsule preferably comprises from 0.1 wt.% to 30 wt.% microcapsule wall, preferably 0.5 wt.% to 25 wt.%, more preferably 1 wt.% to 20 wt.% and 2 wt.% to 15 wt.% microcapsule wall by weight of the microcapsule.
- the microcapsule wall polymers described herein are crosslinked.
- the microcapsules comprise ionic cross-linking agents.
- the ionic cross-linking agent is preferably present at a level of 0.1 wt.% to 10 wt.% by weight of the microcapsule, more preferably 0.5 wt.% to 9 wt.% by weight of the microcapsule, even more preferably 1 to 8 wt.% by weight of the microcapsule.
- an ionic cross linking agent improves drape and/or resilience of a fabric treated with a composition comprising the microcapsules.
- Ionic crosslinking agents are multivalent ions which are capable of forming salt bridges with the functional groups of the protein or polysaccharide polymers. Without wishing to be bound by theory, it is believed that the use of an ionic crosslinking agent leads to improved drape and resilience of a fabric treated with a composition comprising a microcapsule as described herein.
- Suitable ionic crosslinking agents maybe selected from: calcium, copper, aluminum, magnesium, strontium, barium, zinc, tin, organic cations, poly(amino acids), poly(ethyleneimine), poly(vinylamine), poly(allyl amine), polysaccharides, dicarboxylic acids, sulfate ions, carbonate ions, poly(acrylic acids), poly(methacrylic acids), copolymers of acrylic acid or methacrylic acid, sulfonated poly(styrene) and poly(styrene) with carboxylic acid groups and mixtures thereof.
- Particularly preferred are calcium salts, magnesium, sodium, potassium, strontium, barium, zinc.
- the microcapsule may optionally comprise a further crosslinking agents.
- the further crosslinking agent maybe selected from the group consisting of isocyanates, internal crosslinking, transglutaminase, peroxidase, secondary plant substances selected from the group consisting of polyphenols, in particular tannin, gallic acid, ferulic acid, hesperidin, cinnamaldehyde, vanillin, carvacrol, and mixtures of two or more of the aforementioned crosslinking agents.
- the core may also be referred to as the internal phase.
- the core of the microcapsule comprises active material and optionally further comprises solvents, crosslinking agents as described above, or combinations thereof.
- the core is preferably non-aqueous.
- the internal non-aqueous phase may preferably comprise from 20 to 80 wt. %, preferably from 25 to 75 wt.% and even more preferably from 33 to 50 wt.% active material to be encapsulated and preferably from 0.1 to 5 wt.%, preferably from 0.15 to 3.5 wt.% and even more preferably from 0.5 to 2.5 wt.% crosslinking agent and the remaining composition solvent.
- Exemplary active materials include: fragrance; malodour agents for example: uncomplexed cyclodextrin, odor blockers, reactive aldehydes, flavonoids, zeolites, activated carbon, and mixtures thereof; dye transfer inhibitors; shading dyes; silicone oils, resins, and modifications thereof such as linear and cyclic polydimethylsiloxanes, amino-modified, allcyl, aryl, and alkylaryl silicone oils, which preferably have a viscosity of greater than 50,000 cst; insect repellents; organic sunscreen actives, for example, octylmethoxy cinnamate; antimicrobial agents, for example, 2-hydroxy-4, 2,4- trichlorodiphenylether; ester solvents, for example isopropyl myristate; lipids and lipid like substance, for example, cholesterol; hydrocarbons such as paraffins, petrolatum, and mineral oil; fish and vegetable oils; hydrophobic plant extracts; waxes;
- the benefit agents may be dissolved in a solvent.
- suitable solvents include vegetable oils, glycerides, esters of fatty acids and branched alcohols, hydrocarbon, etc. specific examples include: diethyl phthalate, isopropyl myristate, Abalyn® (rosin resins, available from Eastman), benzyl benzoate, ethyl citrate, limonene or other terpenes, triacetin or isoparaffins, preferably Abalyn®, benzyl benzoate, limonene or other terpenes, isoparaffins, or combinations thereof.
- the solvent is 0 to 30 wt.% of the active material, more preferably 0 to 20 wt.% and most preferably 0 to 10 wt.% of the active material.
- the active material comprises fragrance.
- perfume components are well known in the art.
- Useful perfume components may include materials of both natural and synthetic origin. They include single compounds and mixtures. Specific examples of such components may be found in the current literature, e.g., in Fenaroli's Handbook of Flavor Ingredients, 1975, CRC Press; Synthetic Food Adjuncts, 1947 by M. B. Jacobs, edited by Van Nostrand; or Perfume and Flavor Chemicals by S. Arctander 1969, Montclair, N.J. (USA). These substances are well known to the person skilled in the art of perfuming, flavouring, and/or aromatizing consumer products.
- Particularly preferred perfume components are blooming perfume components and substantive perfume components.
- Blooming perfume components are defined by a boiling point less than 250°C and a LogP greater than 2.5.
- encapsulated perfume compositions comprise at least 20 wt.% blooming perfume ingredients, more preferably at least 30 wt.% and most preferably at least 40 wt.% blooming perfume ingredients.
- Substantive perfume components are defined by a boiling point greater than 250°C and a LogP greater than 2.5.
- encapsulated perfume compositions comprises at least 10 wt.% substantive perfume ingredients, more preferably at least 20 wt.% and most preferably at least 30 wt.% substantive perfume ingredients. Boiling point is measured at standard pressure (760 mm Hg).
- a perfume composition will comprise a mixture of blooming and substantive perfume components.
- the perfume composition may comprise other perfume components.
- the amount of encapsulated active material is from 5 wt.% to 95 wt.%, preferably 10 wt.% to 90 wt.% more preferably 15 wt.% to 85 wt.%, and most 20 wt.% to 80 wt.% by weight of the microcapsule.
- the microcapsule composition may comprise further ingredients.
- a preferred further ingredient are polyphenols. Particularly preferred are phenols having a 3,4,5-trihydroxyphenyl group or 3,4-dihydroxypheny group such as tannic acid.
- other polyols can also be used to prepare the microcapsule compositions of this invention.
- Examples include pentaerythritol, dipentaerythritol, glycerol, polyglycerol, ethylene glycol, polyethylene glycol, trimethylolpropane, neopentyl glycol, sorbitol, erythritol, threitol, arabitol, xylitol, ribitol, mannitol, galactitol, fucitol, iditol, inositol, volemitol, isomalt, maltitol, lactitol, maltotriitol, maltotetraitol, polyglycitol, polyphenol, and combinations thereof.
- Polyphenols, polyols, and multi-functional aldehydes are preferably present at a level of 0 wt.% to 40 wt.%, preferably 1 wt.% to 35 wt.% more preferably 5 wt.% to 35 wt.% and most preferably 10 wt.% to 30 wt.%.
- microcapsules described herein preferably have a diameter of 0.1 microns to 1000 microns, more preferably 0.5 microns to 500 microns, even more preferably 1 micron to 200 microns, and most preferably 1 micron to 100 microns.
- the microcapsules can be positively or negatively charged with a zeta potential of preferably - 200 mV to +200 mV, more preferably 25 mV to 200 mV, and most preferably 40 mV to 100 mV.
- a zeta potential is a measurement of electrokinetic potential in the microcapsule. From a theoretical viewpoint, zeta potential is the potential difference between the water phase (/. E. , the dispersion medium) and the stationary layer of water attached to the surface of the microcapsule. The zeta potential can be calculated using theoretical models and an experimentally-determined electrophoretic mobility or dynamic electrophoretic mobility.
- the zeta potential is conventionally measured by methods such as microelectrophoresis, or electrophoretic light scattering, or electroacoustic phenomena.
- microelectrophoresis or electrophoretic light scattering, or electroacoustic phenomena.
- electrophoretic light scattering or electroacoustic phenomena.
- the microcapsule composition of this invention can be a slurry containing a solvent, preferably water.
- the microcapsules are preferably present in the slurry as 0.1 wt.% to 80 wt.%, more preferably 1 wt.% to 65 wt.% and most preferably 5 wt.% to 45 wt.% by weight of the microcapsule composition.
- the slurry may comprise a thickening or suspending agent such as xanthan gum, carboxymethyl cellulose (CMC), microcrystalline cellulose (MCC) or guar gum.
- microcapsule composition of this invention can also be dried, e.g., spray dried, heat dried, and belt dried, to a solid form.
- the microcapsule composition maybe purified by washing the capsule slurry with water until a neutral pH (pH of 6 to 8) is achieved.
- the capsule suspension can be washed using any conventional method including the use of a separatory funnel, filter paper, centrifugation and the like.
- the capsule suspension can be washed one, two, three, four, five, six, or more times until a neutral pH, e.g., pH 6-8 and 6.5-7.5, is achieved.
- the pH of the purified capsules can be determined using any conventional method including, but not limited to pH paper, pH indicators, or a pH meter.
- the purification of the capsules includes the additional step of adding a salt to the capsule suspension prior to the step of washing the capsule suspension with water.
- a salt for use in this step of the invention include, but are not limited to, sodium chloride, potassium chloride or bi-sulphite salts. See US 2014/0017287.
- the polymers When preparing the microcapsule, the polymers may be provided in a solvent.
- Suitable solvents for preparing the microcapsule wall include water or mixtures of water with at least one water- miscible organic solvent.
- Suitable organic solvents include glycerol, 1 ,2-propanediol, 1 ,3- propanediol, ethanediol, diethylene glycol, triethylene glycol, and other analogues.
- the solvent is water.
- a stabiliser may also be present.
- a stabiliser maybe be selected from acrylic co-polymers, preferably with sulphonate groups, copolymers of acrylamides and acrylic acid, copolymers of alkyl acrylates and N-vinylpyrrolidone, such as LUVISKOL® K15, K30 or K90 (BASF); sodium polycarboxylates, sodium polystyrene sulfonates, vinyl and methyl vinyl ether-maleic acid anhydride copolymers as well as ethylene, isobutylene or styrene-maleic acid anhydride copolymers, microcrystalline cellulose, which is commercially available, for example, under the name VIVAPUR®, diutan gum, xanthan gum or carboxymethyl celluloses.
- the crosslinking of the microcapsule preferably involves a catalyst.
- the catalyst may be present in the microcapsule core active material or added separately to the oil-in-water emulsion or dispersion.
- a preferred catalyst for the formation of microcapsules according to the present invention is diazabicyclo[2.2.2]octane (DABCO), also known as triethylenediamine (TEDA).
- DABCO diazabicyclo[2.2.2]octane
- TAA triethylenediamine
- the formation of the microcapsules may be catalyst by heating the oil-in-water emulsion or dispersion. For example, heating to a temperature range of a temperature in the range of 60 °C to 90 °C.
- microcapsules suitable for use in the present invention may be implemented to produce the microcapsules suitable for use in the present invention.
- interfacial polymerization involves the steps of:
- microcapsule core materials including at least one first crosslinking agent, wherein the crosslinking agent is substantially dissolved together with the core materials. This is the oil phase.
- a non-aqueous solvent many optionally be present;
- microcapsule wall materials comprising at least one protein, at least one polysaccharide, or combinations thereof. This is the aqueous phase.
- An aqueous solvent many optionally be present;
- Emulsifying or dispersing the microcapsule core materials with the microcapsule wall materials Preferably in a ratio of from 70 : 30 to 60 : 40, preferably in a range from 30 : 70 to 60 : 40.
- an emulsifier may be used. Emulsification may be achieved by use of high-speed mixing. After completion of this stage, an oil-in-water emulsion or dispersion is present in which the internal phase with the active materials to be encapsulated is finely emulsified or dispersed in the external wall material phase in the form of droplets;
- microcapsules Both the microcapsule shell and microcapsule core can be printed using a printing system. See WO2016172699A1.
- the printing steps generally include depositing the active materials and the microcapsule shell material in a layer-by-layer fashion, preferably through separate printer heads.
- the laundry compositions of the present invention comprise 0.05 to 20 wt.% microcapsules, by weight of the composition. More preferably 0.075 to 10 wt.% microcapsules, most preferably 0.1 to 6 wt.% microcapsules.
- the laundry compositions described herein may be any suitable laundry composition.
- the compositions may be selected from: liquid detergents, powder detergents, fabric conditioners, ancillary compositions such as liquid fragrance boosters or fragrance beads and fabric sprays.
- the composition is a fabric conditioner, ancillary composition, or a fabric spray. More preferably the composition is a fabric conditioner.
- Liquid and powder detergents are cleaning compositions intended for use in the wash stage of the laundry process.
- Detergents comprise anionic and or non-ionic surfactants for cleaning fabrics.
- liquid detergents comprise at least 3%, preferably from 5 to 60%, and more preferably from 6 to 50% (by weight based on the total weight of the composition) of one or more anionic and/or non-ionic surfactants.
- Preferred anionic surfactants include: alkylbenzene sulfonates, preferably linear alkylbenzene sulfonates (LAS); alkyl ether, preferably sulfates sodium lauryl ether sulfate (SLES); alkyl sulfate surfactant, preferably primary alkyl sulfanant (PAS).
- Particularly preferred anionic surfactants are selected from: linear alkyl benezene sulphonates, sodium lauryl ether sulphonates with 1 to 3 moles (average) of ethoxylation, primary alkyl sulphonates, methyl ether sulphates and secondary alkyl sulphonates or mixtures thereof.
- Preferred non-ionic surfactants are polyoxyalkylene compounds. Particularly preferred non-ionic surfactants are selected from: C8 to C22 alkyl phenol ethoxylates with an average of from 5 to 25 moles of ethylene oxide per mole of alkyl phenol; and C8 to C18 aliphatic alcohol ethoxylates with an average of from 2 to 40 moles of ethylene oxide per mole of alcohol.
- Detergents may further comprise: co-surfactants such as amphoteric (zwitterionic) and/or cationic surfactants) in addition to the anionic and/or nonionic surfactants; builders such as hydroxides, carbonates, silicates, zeolites, and mixtures thereof; fatty acids such as aliphatic carboxylic acids; dye transfer inhibitors; anti-redeposition polymers; soil release polymers; transition metal chelating agents; hydrotrope; shading dye; fluorescent agents; enzymes; and combinations thereof.
- co-surfactants such as amphoteric (zwitterionic) and/or cationic surfactants
- builders such as hydroxides, carbonates, silicates, zeolites, and mixtures thereof
- fatty acids such as aliphatic carboxylic acids
- dye transfer inhibitors such as aliphatic carboxylic acids
- anti-redeposition polymers such as aliphatic carboxylic acids
- soil release polymers such as transition metal chelating agents; hydrotrope; shading
- Fabric conditioners are compositions for use in the rinse stage of the laundry process.
- Fabric conditioners comprise fabric softening actives.
- the fabric softening active maybe selected from: quaternary ammonium compounds, silicone polymers, polysaccharides, clays, amines, fatty esters, dispersible polyolefins, polymer latexes and mixtures thereof.
- the fabric softening active is a quaternary ammonium compound, preferably an esterlinked quaternary ammonium compound, for example ester-linked triethanolamine (TEA) quaternary ammonium compounds or diethyldialkylester dimethyl ammonium chloride.
- TAA ester-linked triethanolamine
- Fabric conditioners may further comprise: non-ionic surfactants; co-softeners such as fatty esters and fatty alcohols; cationic polymers; rheology modifiers; and combinations thereof.
- Ancillary compositions are compositions intended to be used in addition to a detergent or fabric conditioner composition.
- Ancillary compositions deliver additional benefit agents in the laundry process. Being a separate product, these compositions allow the consumer to tailor the benefit agents to suit the laundry load and their personal preferences.
- the ancillary laundry compositions may be liquid or solid.
- Liquid ancillary laundry compositions comprise a liquid carrier, preferably water and the microcapsules described herein.
- Liquid ancillary laundry compositions may preferably comprise ingredients such as: non-ionic surfactants, emulsifiers, rheology modifiers, non-encapsulated benefit agents.
- Solid ancillary laundry compositions comprise a solid carrier.
- the carrier material may be selected from the group consisting of: synthetic polymers (e g, polyethylene glycol, ethylene oxide/propylene oxide block copolymers, polyvinyl alcohol, polyvinyl acetate, and derivatives thereof), proteins (e.g., gelatin, albumin, casein), saccharides (e.g. dextrose, fructose, galactose, glucose, isoglucose, sucrose), polysaccharides (e.g., starch, xanthan gum, cellulose, or derivatives thereof), water-soluble or water dispersible fillers (e.g.
- Preferred carrier materials may be selected from the group consisting of synthetic polymers (e g, polyethylene glycol, ethylene oxide/propylene oxide block copolymers, polyvinyl alcohol, polyvinyl acetate, and derivatives thereof), polysaccharides (e.g., starch, xanthan gum, cellulose, or derivatives thereof), saccharides (e.g, dextrose, fructose, galactose, glucose, isoglucose, sucrose), vegetable soap (e.g.
- synthetic polymers e g, polyethylene glycol, ethylene oxide/propylene oxide block copolymers, polyvinyl alcohol, polyvinyl acetate, and derivatives thereof
- polysaccharides e.g., starch, xanthan gum, cellulose, or derivatives thereof
- saccharides e.g, dextrose, fructose, galactose, glucose, isoglucose, sucrose
- vegetable soap e.g.
- the solid ancillary composition may preferably comprise ingredients such as: non-encapsulated benefit agents and dyes.
- Fabric sprays are compositions suitable for spraying onto a fabric.
- the spray comprises a liquid carrier, preferably water and the microcapsules described herein.
- the spray composition may preferably comprise ingredients such as: non-ionic surfactants, non-encapsulated benefit agents, lubricants, structuring polymers, anti-malodor ingredients and combinations thereof.
- the laundry compositions described herein preferably comprises 0.01 to 20 wt.% perfume microcapsules, more preferably 0.05 to 15 wt. % perfume microcapsules, more preferably 0.1 to 10 wt. % perfume microcapsules more preferably 0.5 to 8 wt. % perfume microcapsules by weight of the laundry composition.
- the laundry compositions described herein preferably comprise free perfume in addition to the microcapsules described herein.
- the compositions preferably comprises 0.1 to 15 wt.% free perfume, more preferably 0.5 to 8 wt. % free perfume.
- Particularly preferred perfume components are blooming perfume components and substantive perfume components. Blooming perfume components are defined by a boiling point less than 250°C and a LogP or greater than 2.5. Substantive perfume components are defined by a boiling point greater than 250°C and a LogP greater than 2.5. Boiling point is measured at standard pressure (760 mm Hg).
- a perfume composition will comprise a mixture of blooming and substantive perfume components.
- the perfume composition may comprise other perfume components.
- perfume components it is commonplace for a plurality of perfume components to be present in a free oil perfume composition.
- compositions for use in the present invention it is envisaged that there will be three or more, preferably four or more, more preferably five or more, most preferably six or more different perfume components.
- An upper limit of 300 perfume components may be applied.
- the laundry compositions may further comprise other ingredients of laundry compositions as will be known to the person skilled in the art.
- antifoams e.g. bactericides
- pH buffering agents hydrotropes, anti-redeposition agents, soil-release agents, polyelectrolytes, anti-shrinking agents, anti-wrinkle agents, anti-oxidants, dyes, colorants, sunscreens, anticorrosion agents, drape imparting agents, anti-static agents, sequestrants, pearlisers, opacifiers and ironing aids.
- compositions described herein are used to improve drape and or resilience of a fabric.
- the compositions are applied to a fabric during the laundry process and improved drape and/or resilience is achieved.
- Drape is an assessment of how a fabric hangs under its own weight.
- Resilience is the ability of a fiber to spring back to its natural position after folding, creasing or deformation.
- An improvement in fabric drape or resilience can be measured using a PhabrOmeter® supplied by Nu Cybertek, Inc.
- microcapsules in a laundry composition to improve the drape and/or resilience of a fabric, wherein the microcapsules comprise: a) a microcapsule wall comprising a bio polymer; and b) ionic crosslinking agent.
- Microcapsules A - Pea protein and crosslinked with polyisocyanate Poly[(phenyl isocyanate-co-formaldehyde])
- Microcapsule A was prepared as follows: an oil phase was first prepared by mixing 23.2g of a model fragrance and 4.8g of caprylic/capric triglyceride, 0.38g of benzyl benzoate and an aromatic polyisocyanate 0.38g. In a separate beaker, an aqueous solution was obtained by mixing 1.182g of a pea protein isolate in 170g of water. The oil phase was then emulsified into the aqueous phase to form an oil-in-water emulsion using an ultra turrax mixer at a shear rate of 5000 Revolutions Per Minute (RPM). The oil-in-water emulsion was then cured at 55°C for 2 hours.
- an oil phase was first prepared by mixing 23.2g of a model fragrance and 4.8g of caprylic/capric triglyceride, 0.38g of benzyl benzoate and an aromatic polyisocyanate 0.38g.
- an aqueous solution was obtained by mixing 1.182g of
- Microcapsule 1 was prepared as follows: a 10% w/v solution of pea protein was prepared in demineralised water and the pH was adjusted to pH9 using a few drops of sodium carbonate solution. This was heated to 85 °C and mixed at 300RPM mixed on a tornado mixer for 2hrs.
- the fabric conditioner was prepared by melting the fabric softening active at ⁇ 65 °C. Water was heated to ⁇ 40°C. The minors and fabric softening active were added with stirring. The water was then cooled slightly. The composition was then cooled to room temperature. The perfume microcapsules were then added to the compositions. 2 wt.% is based of weight of microcapsules.
- the washes took place in a Terg-O-Tometer pot. 0.5 ml of the test fabric conditioner composition and 1 L of water were added to the tergo pot, followed by 40g of knitted cotton. The test monitors were rinsed in the liquor for 10 minutes and spun for 30 seconds. The fabrics were then hung to dry in ambient conditions.
- a lower number indicates an improved fabric performance.
- the fabrics treated with a laundry product comprising microcapsules having an ionic crosslinking agent have better fabric shape and drape.
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Abstract
Use of a laundry composition comprising microcapsules to improve the drape and/or resilience of a fabric, wherein the microcapsules comprise: a microcapsule wall comprising a bio polymer; and ionic crosslinking agent.
Description
USE OF A LAUNDRY COMPOSITION COMPRISING MICROCAPSULES TO IMPROVE THE DRAPE AND/OR RESILIENCE OF A FABRIC
Field of the Invention
The present invention is in the field of laundry compositions, in particular laundry compositions for improving the drape or resilience of a fabric.
of the Invention
The drape and resilience of a fabric is a common assessment of fabric in the field of laundry. Drape is an assessment of how a fabric hangs under its own weight. Resilience is the ability of a fiber to spring back to its natural position after folding, creasing or deformation.
Various ingredients have been added to laundry products to improve the drape and/or resilience of fabrics. However, the addition of ingredients to a laundry composition has the drawback of increased complexity in formulation, increased cost and ingredients which may not meet the environmental credentials desired by the consumers.
Microcapsules are used in various laundry applications, to deliver active materials to fabrics. Microcapsules are known to provide various benefits, such as delayed release of protection of the active material against other ingredients in the laundry composition. Conventional microcapsules typically have a microcapsule wall formed of a synthetic polymer such as a melamine formaldehyde polymer or polyacrylate.
Summary of the Invention
It has been found that the use of a microcapsules comprising ionic cross-linking agent leads to improved drape and resilience of fabrics.
Accordingly in a first aspect of the present invention is provided a use of a laundry composition comprising microcapsules to improve the drape and/or resilience of a fabric, wherein the microcapsules comprise: a) a microcapsule wall comprising a bio polymer; and b) ionic crosslinking agent.
Detailed of the Invention
These and other aspects, features and advantages will become apparent to those of ordinary skill in the art from a reading of the following detailed description and the appended claims. For the avoidance of doubt, any feature of one aspect of the present invention may be utilised in any other aspect of the invention. The word “comprising” is intended to mean “including” but not necessarily “consisting of” or “composed of.” In other words, the listed steps or options need not be exhaustive. It is noted that the examples given in the description below are intended to clarify the invention and are not intended to limit the invention to those examples per se.
Similarly, all percentages are weight/weight percentages unless otherwise indicated. Except in the operating and comparative examples, or where otherwise explicitly indicated, all numbers in this description indicating amounts of material or conditions of reaction, physical properties of materials and/or use are to be understood as modified by the word “about”. Numerical ranges expressed in the format "from x to y" are understood to include x and y. When for a specific feature multiple preferred ranges are described in the format "from x to y", it is understood that all ranges combining the different endpoints are also contemplated.
By laundry composition it is herein understood to mean a consumer product suitable for use in a laundry process. Examples of such compositions include liquid laundry detergents, laundry detergent powders, fabric conditioners, ancillary laundry compositions such as scent boosters and fabric spray compositions.
By microcapsule composition it is herein understood to mean the composition comprising microcapsules which is added to a laundry composition. The microcapsule composition may comprise only microcapsules or may be in the form of a slurry comprising microcapsules.
By microcapsule it is herein understood to mean the microcapsule (wall and core) i.e. , without a solvent or slurry.
The laundry products of the present invention comprise microcapsules. The microcapsules may simply be provided as microcapsules but preferably are provided in a microcapsule composition comprising microcapsules in a slurry. The microcapsules comprise a microcapsule core comprising an active ingredient and microcapsule wall encapsulating the core. The microcapsule wall comprises a wall polymer and a crosslinking agent. Typically, the
microcapsules comprise 10 wt.% to 98 wt.% core materials, 1 wt.% to 20 wt.% wall polymer and optionally 0.2 wt.% to 6 wt.% crosslinking agent.
The microcapsules may be prepared by any suitable process including those exemplary processes described here.
Microcapsule wall materials
The microcapsule wall may also be referred to as the microcapsule shell. The microcapsule wall comprises a bio polymer. Bio polymers are natural polymers produced by the cells of living organisms and the derivatives of natural polymers, i.e. polymers derived from bio polymers. Non-limiting examples of suitable bio polymers include: lignin, polysaccharides, proteins and nucleic acids. The microcapsule wall preferably comprises proteins, polysaccharides and mixtures thereof. The biopolymer may be treated by various processes to provide derivatives, including but not limited to hydrolysis, condensation, functionalising such as ethoxylating, crosslinking, etc. Without wishing to be bound by theory, it is believed that the use of proteins or polysaccharides improves the ‘hand’ of a fabric when treated with compositions comprising the microcapsules described herein. The microcapsule wall materials are preferably in an aqueous solution. The microcapsule wall preferably comprises 20 wt.% to 100 wt.% protein, polysaccharide or combinations thereof, more preferably 30 wt.% to 98 wt.%, more preferably 35 wt.% to 95 wt.%, and most preferably 65 wt.% to 90 wt.% by weight of the microcapsule wall.
As is conventional in the art, a “polypeptide” or “protein” is a linear organic polymer composed of amino acid residues bonded together in a chain, forming part of (or the whole of) a protein molecule. “Polypeptide” or “protein” as used herein means a natural polypeptide, polypeptide derivative, and/or modified polypeptide. The polypeptide may exhibit an average molecular weight of from 1 ,000 Da to 40,000,000 Da, preferably greater than 10,000 Da, more preferably, 100,000 Da, most preferably greater than 1,000,000 Da and preferably less than 3,000,000 Da.
Suitable proteins for use in this invention include whey proteins, plant proteins and gelatine. Preferably the plant proteins are used. Suitable preferred proteins include proteins selected from: pea, potato proteins, brown rice, white rice, wheat, egg, barley, pumpkin seed, oat, almond, whey, casein, silk, gelatin, algae, rye, spelt, gluten, rapeseed, sunflower, corn, soybean, bean, chickpea, lentil, lupin, peanut, alfalfa, hemp, proteins resulting from fermentation, proteins from food waste and combinations thereof. Particularly preferred proteins
include proteins selected from chickpea, pea proteins, potato proteins, brown rice proteins, white rice proteins, wheat proteins, barley proteins, pumpkin seed proteins, oat proteins, almond proteins, and combinations thereof. This includes derivatives of the aforementioned proteins.
As used herein, whey protein refers to the protein contained in whey, a dairy liquid obtained as a supernatant of curds when milk or a dairy liquid containing milk components, is processed into cheese curd to obtain a cheese-making curd as a semisolid. Whey protein is generally understood in principle to include the globular proteins b-lactoglobulin and a-lactalbumin at various ratios such as 1: 1 to 5: 1 (e.g., 2: 1). It may also include lower amounts of serum albumin, immunoglobulin and other globulins. The term whey protein is also intended to include partially or completely modified or denatured whey proteins. Purified b-lactoglobulin and/or a- lactalbumin polypeptides may also be used in preparation of microcapsules of this invention.
Gelatin refers to a mixture of proteins produced by partial hydrolysis of collagen extracted from the skin, bones, and connective tissues of animals. Gelatin can be derived from any type of collagen, such as collagen type I, II, III, or IV. Such proteins are characterized by including Gly- Xaa-Yaa triplets wherein Gly is the amino acid glycine and Xaa and Yaa can be the same or different and can be any known amino acid. At least 40% of the amino acids are preferably present in the form of consecutive Gly-Xaa-Yaa triplets.
A preferred class of proteins are plant proteins. Plant proteins are proteins that accumulate in various plant tissues. Preferred plant proteins can be classified into two classes: seed or grain proteins and vegetable proteins. Seed/grain proteins are a set of proteins that accumulate to high levels in seeds/grains during the late stages of seed/grain development, whereas vegetable proteins are proteins that accumulate in vegetative tissues such as leaves, stems and, depending on plant species, tubers.
Preferred examples of seed/grain/legumes storage proteins are proteins from: soya, lupine, pea, chickpea, alfalfa, horse bean, lentil, and haricot bean; from oilseed plants such as colza, cottonseed and sunflower; from cereals like wheat, maize, barley, malt, oats, rye and rice (e.g., brown rice protein), or a combination thereof.
Preferred examples of vegetable protein are proteins form: potato or sweet potato tubers.
The term plant protein is intended to include a plant protein isolate, plant protein concentrate, or a combination thereof. Plant protein isolates and concentrates are generally understood to be composed of several proteins. For example, pea protein isolates and concentrates may include legumin, vicilin and convicilin proteins. Similarly, brown rice protein isolates may include albumin, globulin and glutelin proteins. The term “plant protein” is also intended to include a partially or completely modified or denatured plant storage protein. Individual polypeptides (e.g., legumin, vicilin, convicilin, albumin, globulin or glutelin) may also be used in preparation of microcapsules of this invention.
A native protein maybe preferred. However, the process may include a step of denaturing the protein by pH adjustment, heat, or adding a chaotropic agent to the oil-in-water emulsion or to the protein before adding to the oil-in-water emulsion.
Denaturation is a process in which proteins (polypeptides) lose the quaternary structure, tertiary structure, and secondary structure present in their native state, by application of a denaturation condition. During denaturation, proteins change their conformational structure by unfolding, thereby making amine and hydroxyl groups available for crosslinking (such as crosslinking with polyisocyanate) to form a microcapsule wall. Exemplary conditions for protein denaturation include, but are not limited to, radiation, exposure to heat or cold, changes in pH with an acid or base, exposure to denaturing agents such as detergents, inorganic salt, organic solvent (e.g., alcohol, ethyl acetate, and chloroform), urea, or other chaotropic agents, or mechanical stress including shear. Exemplary chaotropic agents are guanidine salts (e.g., guanidine hydrochloride and guanidine carbonate), urea, polysorbate, sodium benzoate, vanillin, o-cresol, phenol, propanol, formamide, ethanol, fructose, ammonium sulfate, ammonium chloride, ammonium nitrate, ammonium phosphate, potassium sulfate, potassium chloride, potassium iodide, potassium nitrate, potassium phosphate, sodium sulfate, sodium chloride, sodium bromide, sodium nitrate, sodium phosphate, guanidine thiocyanate, xylose, glycerol, benzyl alcohol, ethyl acetate, triton X-100, ethyl acetate, cetyltrimethylammonium halide, acetone, sodium dodecyl sulfate (SDS), hydrochloric acid, sulfuric acid, polyethylene glycol, glutaraldehyde, and combinations thereof. Any amount of the chaotropic agent can be used.
It may be preferred that the protein is denatured with a chaotropic agent so that 20 wt. % to 100 wt.% preferably 40 wt. % to 100 wt. %, more preferably 60 wt.% to 100 wt.%, most preferably 90 wt.% to 100 wt.% of the protein used in the preparation of the microcapsules is denatured.
The protein used in the microcapsule can also be derivatized or modified (e.g., derivatized or chemically modified). For example, the protein can be modified by covalently attaching sugars, lipids, cofactors, peptides, or other chemical groups including phosphate, acetate, methyl, and other natural or unnatural molecule.
Polysaccharides are a class of carbohydrates comprising multiple monosaccharide units. “Polysaccharide” as used herein means a natural polysaccharide, polysaccharide derivative, and/or modified polysacharide. Suitable polysaccharides maybe selected from the group consisting of fibres, starch, sugar alcohols, sugars and mixtures thereof.
Examples of suitable fibres include: particular cellulose, cellulose derivatives such as hydroxyethyl cellulose, in particular quaternized hydroxyethyl cellulose, carboxymethylcellulose (CMC) and microcrystalline cellulose (MCC), hemicelluloses, lichenin, chitin, chitosan, lignin, xanthan, plant fibers, in particular cereal fibers, potato fibers, apple fibers, citrus fibers, bamboo fibers, extracted sugar beet fibers; oat fibers and soluble dietary fibers, in particular inulin, especially native inulin, highly soluble inulin, granulated inulin, high performance inulin, pectins, alginates, agar, carrageenan, gum arabic (Senegal type, Seyal type), konjac gum, gellan gum, curdlan (paramylon), guar gum, locust bean gum, xanthan gum, raffinose, xylose, polydextrose and lactulose and combinations thereof. This includes derivatives of the aforementioned polysaccharides.
Examples of suitable starches include starch from: wheat, potatoes, corn, rice, tapioca and oats, modified starch, and starch derivatives, e.g., dextrins or maltodextrins, in particular dextrins and maltodextrins from wheat, potatoes, corn, rice, pea, chickpea and oats, oligosaccharides, in particular oligofructose. Preferred starches are selected from: corn starch, potato starch, rye starch, wheat starch, barley starch, oat starch, rice starch, pea starch, chickpea starch, tapioca starch, and mixtures thereof.
Examples of suitable sugar alcohols include: sorbitol, mannitol, isomalt, maltitol, maltilol syrup, lactitol, xylitol, erythritol.
An example of suitable sugar includes: glucose.
Particularly preferred polysaccharides include: gum Arabic, dextrins and maltodextrins are particularly preferred.
The polysaccharide used in the microcapsule can also be derivatized or modified (e.g., derivatized or chemically modified). For example, the protein can be modified by covalently attaching sugars, lipids, cofactors, peptides, or other chemical groups including phosphate, acetate, methyl, and other natural or unnatural molecule. Examples of suitable polysaccharide derivatives include: starch glycolate, carboxymethyl starch, hydroxyalkyl cellulose and crosslinked modified cellulose.
The microcapsules as described herein may optionally comprise additional polymers in the microcapsule walls. Such additional polymers may include: a sol-gel polymer (e.g., silica), polyacrylate, polyacrylamide, poly(acrylate-co-acrylamide), polyurea, polyurethane, starch, gelatin and gum Arabic, poly(melamine-formaldehyde), poly(urea-formaldehyde), and combinations thereof. However preferably the microcapsule wall polymers consist essentially of proteins, polysaccharides, or combinations thereof.
The microcapsule preferably comprises from 0.1 wt.% to 30 wt.% microcapsule wall, preferably 0.5 wt.% to 25 wt.%, more preferably 1 wt.% to 20 wt.% and 2 wt.% to 15 wt.% microcapsule wall by weight of the microcapsule.
The microcapsule wall polymers described herein are crosslinked. The microcapsules comprise ionic cross-linking agents. The ionic cross-linking agent is preferably present at a level of 0.1 wt.% to 10 wt.% by weight of the microcapsule, more preferably 0.5 wt.% to 9 wt.% by weight of the microcapsule, even more preferably 1 to 8 wt.% by weight of the microcapsule.
Without wishing to be bound by theory, the selection of an ionic cross linking agent improves drape and/or resilience of a fabric treated with a composition comprising the microcapsules.
Ionic crosslinking agents are multivalent ions which are capable of forming salt bridges with the functional groups of the protein or polysaccharide polymers. Without wishing to be bound by theory, it is believed that the use of an ionic crosslinking agent leads to improved drape and resilience of a fabric treated with a composition comprising a microcapsule as described herein.
Suitable ionic crosslinking agents maybe selected from: calcium, copper, aluminum, magnesium, strontium, barium, zinc, tin, organic cations, poly(amino acids), poly(ethyleneimine), poly(vinylamine), poly(allyl amine), polysaccharides, dicarboxylic acids, sulfate ions, carbonate ions, poly(acrylic acids), poly(methacrylic acids), copolymers of acrylic
acid or methacrylic acid, sulfonated poly(styrene) and poly(styrene) with carboxylic acid groups and mixtures thereof. Particularly preferred are calcium salts, magnesium, sodium, potassium, strontium, barium, zinc.
The microcapsule may optionally comprise a further crosslinking agents. The further crosslinking agent maybe selected from the group consisting of isocyanates, internal crosslinking, transglutaminase, peroxidase, secondary plant substances selected from the group consisting of polyphenols, in particular tannin, gallic acid, ferulic acid, hesperidin, cinnamaldehyde, vanillin, carvacrol, and mixtures of two or more of the aforementioned crosslinking agents.
Microcapsule core materials
The core may also be referred to as the internal phase. The core of the microcapsule comprises active material and optionally further comprises solvents, crosslinking agents as described above, or combinations thereof. The core is preferably non-aqueous.
The internal non-aqueous phase may preferably comprise from 20 to 80 wt. %, preferably from 25 to 75 wt.% and even more preferably from 33 to 50 wt.% active material to be encapsulated and preferably from 0.1 to 5 wt.%, preferably from 0.15 to 3.5 wt.% and even more preferably from 0.5 to 2.5 wt.% crosslinking agent and the remaining composition solvent.
Exemplary active materials include: fragrance; malodour agents for example: uncomplexed cyclodextrin, odor blockers, reactive aldehydes, flavonoids, zeolites, activated carbon, and mixtures thereof; dye transfer inhibitors; shading dyes; silicone oils, resins, and modifications thereof such as linear and cyclic polydimethylsiloxanes, amino-modified, allcyl, aryl, and alkylaryl silicone oils, which preferably have a viscosity of greater than 50,000 cst; insect repellents; organic sunscreen actives, for example, octylmethoxy cinnamate; antimicrobial agents, for example, 2-hydroxy-4, 2,4- trichlorodiphenylether; ester solvents, for example isopropyl myristate; lipids and lipid like substance, for example, cholesterol; hydrocarbons such as paraffins, petrolatum, and mineral oil; fish and vegetable oils; hydrophobic plant extracts; waxes; pigments including inorganic compounds with hydrophobically- modified surface and/ or dispersed in an oil or a hydrophobic liquid; sugar-esters, such as sucrose polyester (SPE); and combinations thereof.
The benefit agents may be dissolved in a solvent. Examples of suitable solvents include vegetable oils, glycerides, esters of fatty acids and branched alcohols, hydrocarbon, etc. specific examples include: diethyl phthalate, isopropyl myristate, Abalyn® (rosin resins, available from Eastman), benzyl benzoate, ethyl citrate, limonene or other terpenes, triacetin or isoparaffins, preferably Abalyn®, benzyl benzoate, limonene or other terpenes, isoparaffins, or combinations thereof. Preferably, if present, the solvent is 0 to 30 wt.% of the active material, more preferably 0 to 20 wt.% and most preferably 0 to 10 wt.% of the active material.
Most preferably the active material comprises fragrance. Perfume components are well known in the art. Useful perfume components may include materials of both natural and synthetic origin. They include single compounds and mixtures. Specific examples of such components may be found in the current literature, e.g., in Fenaroli's Handbook of Flavor Ingredients, 1975, CRC Press; Synthetic Food Adjuncts, 1947 by M. B. Jacobs, edited by Van Nostrand; or Perfume and Flavor Chemicals by S. Arctander 1969, Montclair, N.J. (USA). These substances are well known to the person skilled in the art of perfuming, flavouring, and/or aromatizing consumer products.
Particularly preferred perfume components are blooming perfume components and substantive perfume components. Blooming perfume components are defined by a boiling point less than 250°C and a LogP greater than 2.5. Preferably encapsulated perfume compositions comprise at least 20 wt.% blooming perfume ingredients, more preferably at least 30 wt.% and most preferably at least 40 wt.% blooming perfume ingredients. Substantive perfume components are defined by a boiling point greater than 250°C and a LogP greater than 2.5. Preferably encapsulated perfume compositions comprises at least 10 wt.% substantive perfume ingredients, more preferably at least 20 wt.% and most preferably at least 30 wt.% substantive perfume ingredients. Boiling point is measured at standard pressure (760 mm Hg). Preferably a perfume composition will comprise a mixture of blooming and substantive perfume components. The perfume composition may comprise other perfume components.
It is commonplace for a plurality of perfume components to be present in a microcapsule. In the compositions for use in the present invention it is envisaged that there will be three or more, preferably four or more, more preferably five or more, most preferably six or more different perfume components in a microcapsule. An upper limit of 300 perfume components may be applied.
Preferably the amount of encapsulated active material is from 5 wt.% to 95 wt.%, preferably 10 wt.% to 90 wt.% more preferably 15 wt.% to 85 wt.%, and most 20 wt.% to 80 wt.% by weight of the microcapsule.
Additional microcapsule ingredients
The microcapsule composition may comprise further ingredients. A preferred further ingredient are polyphenols. Particularly preferred are phenols having a 3,4,5-trihydroxyphenyl group or 3,4-dihydroxypheny group such as tannic acid. In additional to polyphenols, other polyols can also be used to prepare the microcapsule compositions of this invention. Examples include pentaerythritol, dipentaerythritol, glycerol, polyglycerol, ethylene glycol, polyethylene glycol, trimethylolpropane, neopentyl glycol, sorbitol, erythritol, threitol, arabitol, xylitol, ribitol, mannitol, galactitol, fucitol, iditol, inositol, volemitol, isomalt, maltitol, lactitol, maltotriitol, maltotetraitol, polyglycitol, polyphenol, and combinations thereof.
Polyphenols, polyols, and multi-functional aldehydes are preferably present at a level of 0 wt.% to 40 wt.%, preferably 1 wt.% to 35 wt.% more preferably 5 wt.% to 35 wt.% and most preferably 10 wt.% to 30 wt.%.
Microcapsule composition
The microcapsules described herein preferably have a diameter of 0.1 microns to 1000 microns, more preferably 0.5 microns to 500 microns, even more preferably 1 micron to 200 microns, and most preferably 1 micron to 100 microns.
The microcapsules can be positively or negatively charged with a zeta potential of preferably - 200 mV to +200 mV, more preferably 25 mV to 200 mV, and most preferably 40 mV to 100 mV. Preferably, the microcapsules are positively charged. Zeta potential is a measurement of electrokinetic potential in the microcapsule. From a theoretical viewpoint, zeta potential is the potential difference between the water phase (/. E. , the dispersion medium) and the stationary layer of water attached to the surface of the microcapsule. The zeta potential can be calculated using theoretical models and an experimentally-determined electrophoretic mobility or dynamic electrophoretic mobility. The zeta potential is conventionally measured by methods such as microelectrophoresis, or electrophoretic light scattering, or electroacoustic phenomena. For
more detailed discussion on measurement of zeta potential, see Dukhin and Goetz, "Ultrasound for characterizing colloids", Elsevier, 2002.
The microcapsule composition of this invention can be a slurry containing a solvent, preferably water. The microcapsules are preferably present in the slurry as 0.1 wt.% to 80 wt.%, more preferably 1 wt.% to 65 wt.% and most preferably 5 wt.% to 45 wt.% by weight of the microcapsule composition. The slurry may comprise a thickening or suspending agent such as xanthan gum, carboxymethyl cellulose (CMC), microcrystalline cellulose (MCC) or guar gum.
Alternatively, the microcapsule composition of this invention can also be dried, e.g., spray dried, heat dried, and belt dried, to a solid form.
The microcapsule composition maybe purified by washing the capsule slurry with water until a neutral pH (pH of 6 to 8) is achieved. For the purposes of the present invention, the capsule suspension can be washed using any conventional method including the use of a separatory funnel, filter paper, centrifugation and the like. The capsule suspension can be washed one, two, three, four, five, six, or more times until a neutral pH, e.g., pH 6-8 and 6.5-7.5, is achieved. The pH of the purified capsules can be determined using any conventional method including, but not limited to pH paper, pH indicators, or a pH meter. In certain embodiments of this invention, the purification of the capsules includes the additional step of adding a salt to the capsule suspension prior to the step of washing the capsule suspension with water. Exemplary salts of use in this step of the invention include, but are not limited to, sodium chloride, potassium chloride or bi-sulphite salts. See US 2014/0017287.
Preparation of the microcapsules
When preparing the microcapsule, the polymers may be provided in a solvent. Suitable solvents for preparing the microcapsule wall include water or mixtures of water with at least one water- miscible organic solvent. Suitable organic solvents include glycerol, 1 ,2-propanediol, 1 ,3- propanediol, ethanediol, diethylene glycol, triethylene glycol, and other analogues. Preferably the solvent is water.
A stabiliser may also be present. A stabiliser maybe be selected from acrylic co-polymers, preferably with sulphonate groups, copolymers of acrylamides and acrylic acid, copolymers of alkyl acrylates and N-vinylpyrrolidone, such as LUVISKOL® K15, K30 or K90 (BASF); sodium
polycarboxylates, sodium polystyrene sulfonates, vinyl and methyl vinyl ether-maleic acid anhydride copolymers as well as ethylene, isobutylene or styrene-maleic acid anhydride copolymers, microcrystalline cellulose, which is commercially available, for example, under the name VIVAPUR®, diutan gum, xanthan gum or carboxymethyl celluloses.
The crosslinking of the microcapsule preferably involves a catalyst. The catalyst may be present in the microcapsule core active material or added separately to the oil-in-water emulsion or dispersion. A preferred catalyst for the formation of microcapsules according to the present invention is diazabicyclo[2.2.2]octane (DABCO), also known as triethylenediamine (TEDA). Also suitable are catalysts based on bismuth or tin, transglutaminase, peroxidase, secondary plant compounds selected from the group, which consists of polyphenols, in particular tannin, gallic acid, ferulic acid, hesperidin, cinnamaldehyde, vanillin, carvacrol, and mixtures thereof.
Alternatively, or additionally the formation of the microcapsules may be catalyst by heating the oil-in-water emulsion or dispersion. For example, heating to a temperature range of a temperature in the range of 60 °C to 90 °C.
Various suitable methods of production may be implemented to produce the microcapsules suitable for use in the present invention.
One suitable method if interfacial polymerization. An examples of interfacial polymerization involves the steps of:
(i) Providing the microcapsule core materials including at least one first crosslinking agent, wherein the crosslinking agent is substantially dissolved together with the core materials. This is the oil phase. A non-aqueous solvent many optionally be present;
(ii) Providing the microcapsule wall materials comprising at least one protein, at least one polysaccharide, or combinations thereof. This is the aqueous phase. An aqueous solvent many optionally be present;
(iii) Emulsifying or dispersing the microcapsule core materials with the microcapsule wall materials. Preferably in a ratio of from 70 : 30 to 60 : 40, preferably in a range from 30 : 70 to 60 : 40. Optionally an emulsifier may be used. Emulsification may be achieved by use of high-speed mixing. After completion of this stage, an oil-in-water emulsion or dispersion
is present in which the internal phase with the active materials to be encapsulated is finely emulsified or dispersed in the external wall material phase in the form of droplets;
(iv) First crosslinking optionally by the addition of at least one catalyst to obtain a microcapsule slurry, optionally with the addition of further protein, polysaccharide polymers, or combinations thereof;
(v) Curing the microcapsule slurry, preferably at a temperature of at least 60 °, preferably for at least 30 minutes, followed by cooling;
(vi) Optionally drying, using methods such as spray drying, filtration, or freeze drying.
An alternative method involves 3D printing the microcapsules. Both the microcapsule shell and microcapsule core can be printed using a printing system. See WO2016172699A1. The printing steps generally include depositing the active materials and the microcapsule shell material in a layer-by-layer fashion, preferably through separate printer heads.
Laundry composition
The laundry compositions of the present invention comprise 0.05 to 20 wt.% microcapsules, by weight of the composition. More preferably 0.075 to 10 wt.% microcapsules, most preferably 0.1 to 6 wt.% microcapsules.
The laundry compositions described herein may be any suitable laundry composition. The compositions may be selected from: liquid detergents, powder detergents, fabric conditioners, ancillary compositions such as liquid fragrance boosters or fragrance beads and fabric sprays. Preferably the composition is a fabric conditioner, ancillary composition, or a fabric spray. More preferably the composition is a fabric conditioner.
Liquid and powder detergents are cleaning compositions intended for use in the wash stage of the laundry process. Detergents comprise anionic and or non-ionic surfactants for cleaning fabrics. Preferably liquid detergents comprise at least 3%, preferably from 5 to 60%, and more preferably from 6 to 50% (by weight based on the total weight of the composition) of one or more anionic and/or non-ionic surfactants. Preferred anionic surfactants include: alkylbenzene sulfonates, preferably linear alkylbenzene sulfonates (LAS); alkyl ether, preferably sulfates
sodium lauryl ether sulfate (SLES); alkyl sulfate surfactant, preferably primary alkyl sulfanant (PAS). Particularly preferred anionic surfactants are selected from: linear alkyl benezene sulphonates, sodium lauryl ether sulphonates with 1 to 3 moles (average) of ethoxylation, primary alkyl sulphonates, methyl ether sulphates and secondary alkyl sulphonates or mixtures thereof. Preferred non-ionic surfactants are polyoxyalkylene compounds. Particularly preferred non-ionic surfactants are selected from: C8 to C22 alkyl phenol ethoxylates with an average of from 5 to 25 moles of ethylene oxide per mole of alkyl phenol; and C8 to C18 aliphatic alcohol ethoxylates with an average of from 2 to 40 moles of ethylene oxide per mole of alcohol.
Detergents may further comprise: co-surfactants such as amphoteric (zwitterionic) and/or cationic surfactants) in addition to the anionic and/or nonionic surfactants; builders such as hydroxides, carbonates, silicates, zeolites, and mixtures thereof; fatty acids such as aliphatic carboxylic acids; dye transfer inhibitors; anti-redeposition polymers; soil release polymers; transition metal chelating agents; hydrotrope; shading dye; fluorescent agents; enzymes; and combinations thereof.
Fabric conditioners are compositions for use in the rinse stage of the laundry process. Fabric conditioners comprise fabric softening actives. The fabric softening active maybe selected from: quaternary ammonium compounds, silicone polymers, polysaccharides, clays, amines, fatty esters, dispersible polyolefins, polymer latexes and mixtures thereof. Preferably the fabric softening active is a quaternary ammonium compound, preferably an esterlinked quaternary ammonium compound, for example ester-linked triethanolamine (TEA) quaternary ammonium compounds or diethyldialkylester dimethyl ammonium chloride.
Fabric conditioners may further comprise: non-ionic surfactants; co-softeners such as fatty esters and fatty alcohols; cationic polymers; rheology modifiers; and combinations thereof.
Ancillary compositions are compositions intended to be used in addition to a detergent or fabric conditioner composition. Ancillary compositions deliver additional benefit agents in the laundry process. Being a separate product, these compositions allow the consumer to tailor the benefit agents to suit the laundry load and their personal preferences. The ancillary laundry compositions may be liquid or solid.
Liquid ancillary laundry compositions comprise a liquid carrier, preferably water and the microcapsules described herein. Liquid ancillary laundry compositions may preferably comprise
ingredients such as: non-ionic surfactants, emulsifiers, rheology modifiers, non-encapsulated benefit agents.
Solid ancillary laundry compositions comprise a solid carrier. The carrier material may be selected from the group consisting of: synthetic polymers (e g, polyethylene glycol, ethylene oxide/propylene oxide block copolymers, polyvinyl alcohol, polyvinyl acetate, and derivatives thereof), proteins (e.g., gelatin, albumin, casein), saccharides (e.g. dextrose, fructose, galactose, glucose, isoglucose, sucrose), polysaccharides (e.g., starch, xanthan gum, cellulose, or derivatives thereof), water-soluble or water dispersible fillers (e.g. sodium chloride, sodium sulfate, sodium carbonate/bicarbonate, zeolite, silica, clay), vegetable soap (e.g. coconut soap beads or palm soap), ethoxylated non-ionic surfactants (having a formula RIO(R2O)XH, wherein Ri preferably comprises 12 to 20 carbon atoms, R2 is C2H4 or mixture of C2H4 and C3H6 units and x = 8 to 120), urea and combinations thereof. Preferred carrier materials may be selected from the group consisting of synthetic polymers (e g, polyethylene glycol, ethylene oxide/propylene oxide block copolymers, polyvinyl alcohol, polyvinyl acetate, and derivatives thereof), polysaccharides (e.g., starch, xanthan gum, cellulose, or derivatives thereof), saccharides (e.g, dextrose, fructose, galactose, glucose, isoglucose, sucrose), vegetable soap (e.g. coconut soap beads or palm soap), ethoxylated non-ionic surfactants (having a formula RIO(R2O)XH, wherein R1 preferably comprises 12 to 20 carbon atoms, R2 is C2H4 or mixture of C2H4 and C3H6 units and x = 8 to 120) and combinations thereof. The solid ancillary composition may preferably comprise ingredients such as: non-encapsulated benefit agents and dyes.
Fabric sprays are compositions suitable for spraying onto a fabric. The spray comprises a liquid carrier, preferably water and the microcapsules described herein. The spray composition may preferably comprise ingredients such as: non-ionic surfactants, non-encapsulated benefit agents, lubricants, structuring polymers, anti-malodor ingredients and combinations thereof.
The laundry compositions described herein preferably comprises 0.01 to 20 wt.% perfume microcapsules, more preferably 0.05 to 15 wt. % perfume microcapsules, more preferably 0.1 to 10 wt. % perfume microcapsules more preferably 0.5 to 8 wt. % perfume microcapsules by weight of the laundry composition.
The laundry compositions described herein preferably comprise free perfume in addition to the microcapsules described herein. The compositions preferably comprises 0.1 to 15 wt.% free perfume, more preferably 0.5 to 8 wt. % free perfume.
Particularly preferred perfume components are blooming perfume components and substantive perfume components. Blooming perfume components are defined by a boiling point less than 250°C and a LogP or greater than 2.5. Substantive perfume components are defined by a boiling point greater than 250°C and a LogP greater than 2.5. Boiling point is measured at standard pressure (760 mm Hg). Preferably a perfume composition will comprise a mixture of blooming and substantive perfume components. The perfume composition may comprise other perfume components.
It is commonplace for a plurality of perfume components to be present in a free oil perfume composition. In the compositions for use in the present invention it is envisaged that there will be three or more, preferably four or more, more preferably five or more, most preferably six or more different perfume components. An upper limit of 300 perfume components may be applied.
The laundry compositions may further comprise other ingredients of laundry compositions as will be known to the person skilled in the art. Among such materials there may be mentioned: antifoams, insect repellents, shading or hueing dyes, preservatives (e.g. bactericides), pH buffering agents, hydrotropes, anti-redeposition agents, soil-release agents, polyelectrolytes, anti-shrinking agents, anti-wrinkle agents, anti-oxidants, dyes, colorants, sunscreens, anticorrosion agents, drape imparting agents, anti-static agents, sequestrants, pearlisers, opacifiers and ironing aids.
Use of the compositions
The compositions described herein are used to improve drape and or resilience of a fabric. The compositions are applied to a fabric during the laundry process and improved drape and/or resilience is achieved. Drape is an assessment of how a fabric hangs under its own weight. Resilience is the ability of a fiber to spring back to its natural position after folding, creasing or deformation. An improvement in fabric drape or resilience can be measured using a PhabrOmeter® supplied by Nu Cybertek, Inc.
Also described herein is the use of microcapsules in a laundry composition to improve the drape and/or resilience of a fabric, wherein the microcapsules comprise:
a) a microcapsule wall comprising a bio polymer; and b) ionic crosslinking agent.
Examples
Preparation of microcapsules
The following microcapsules were used to assess the effects of the compositions described herein:
• Microcapsules A - Pea protein and crosslinked with polyisocyanate (Poly[(phenyl isocyanate-co-formaldehyde])
• Microcapsules 1 - Pea protein and sodium alginate mix and with salt crosslinking
The same model fragrance composition was used in all microcapsules.
Microcapsule A was prepared as follows: an oil phase was first prepared by mixing 23.2g of a model fragrance and 4.8g of caprylic/capric triglyceride, 0.38g of benzyl benzoate and an aromatic polyisocyanate 0.38g. In a separate beaker, an aqueous solution was obtained by mixing 1.182g of a pea protein isolate in 170g of water. The oil phase was then emulsified into the aqueous phase to form an oil-in-water emulsion using an ultra turrax mixer at a shear rate of 5000 Revolutions Per Minute (RPM). The oil-in-water emulsion was then cured at 55°C for 2 hours.
Microcapsule 1 was prepared as follows: a 10% w/v solution of pea protein was prepared in demineralised water and the pH was adjusted to pH9 using a few drops of sodium carbonate solution. This was heated to 85 °C and mixed at 300RPM mixed on a tornado mixer for 2hrs.
After 2hrs the pH was dropped to pH7 with a few drops of 2M HCI solution and 1.5g of sodium alginate was added.
This was further mixed at 300RPM for 90min until homogeneous and then was left overnight to cool down. Once cool the next day 22.5g of fragrance oil was added and mixed at 300RPM for
1 hr. The prepolymer mix was then added into a 80ml solution containing tween 80, calcium chloride and DI water at varying concentrations. The solution was homogenised to produce a suspension. Table 2: Microcapsule 1 composition
Preparation of fabric conditioner
Fabric softening active1 - Dialkyloxyethyl Hydroxyethyl Methyl Ammonium Methyl sulphate
The fabric conditioner was prepared by melting the fabric softening active at ~65 °C. Water was heated to ~40°C. The minors and fabric softening active were added with stirring. The water was then cooled slightly. The composition was then cooled to room temperature. The perfume microcapsules were then added to the compositions. 2 wt.% is based of weight of microcapsules.
Wash method
The washes took place in a Terg-O-Tometer pot. 0.5 ml of the test fabric conditioner composition and 1 L of water were added to the tergo pot, followed by 40g of knitted cotton. The test monitors were rinsed in the liquor for 10 minutes and spun for 30 seconds. The fabrics were then hung to dry in ambient conditions.
Analysis
The properties of the fabrics were assessed using a Phabrometer by NUCybertek*. A 11 ,3cm disc is cut out from the test fabric. The fabric measurements were performed using a Phabrometer and according to AATCC standard TM202. 10 repeat measurements were taken for each fabric, and the results averaged.
Table 4: Results
A lower number indicates an improved fabric performance. The fabrics treated with a laundry product comprising microcapsules having an ionic crosslinking agent have better fabric shape and drape.
Claims
1. Use of a laundry composition comprising microcapsules to improve the drape and/or resilience of a fabric, wherein the microcapsules comprise: a) a microcapsule wall comprising a bio polymer; and b) ionic crosslinking agent.
2. Use according to claim 1, wherein the microcapsules encapsulate fabric benefit agents.
3. Use according to any preceding claim wherein the microcapsules encapsulate perfume.
4. Use according to any preceding claim, wherein the laundry composition comprises 0.05 to 20 wt.% microcapsules.
5. Use according to any preceding claim, wherein the laundry composition is selected from: liquid laundry detergents, powdered laundry detergents, fabric conditioners, ancillary laundry compositions and fabric sprays.
6. Use according to any preceding claim wherein the laundry composition is a fabric conditioner composition.
7. Use according to any preceding claim wherein the biopolymer comprises a polymer selected from proteins, polysaccharides, or combinations thereof.
8. Use according to any proceeding claims, wherein the microcapsules comprise 0.1 wt.% to 10 wt.% crosslinking agent by weight of the microcapsule.
9. Use according to any proceeding claims, wherein the ionic crosslinking agent comprises: calcium, copper, aluminum, magnesium, strontium, barium, zinc, tin, organic cations, poly(amino acids), poly(ethyleneimine), poly(vinylamine), poly(allyl amine) and polysaccharides, dicarboxylic acids, sulfate ions, carbonate ions, poly(acrylic acids), poly(methacrylic acids), copolymers of acrylic acid or methacrylic acid, sulfonated poly(styrene) and poly(styrene) with carboxylic acid groups and mixtures thereof.
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Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20140017287A1 (en) | 2009-09-18 | 2014-01-16 | International Flavors & Fragrances Inc. | Purified polyurea capsules, methods of preparation, and products containing the same |
WO2016172699A1 (en) | 2015-04-24 | 2016-10-27 | International Flavors & Fragrances Inc. | Delivery systems and methods of preparing the same |
WO2017102306A1 (en) * | 2015-12-15 | 2017-06-22 | Unilever Plc | Fabric conditioning composition |
US20180195024A1 (en) * | 2017-01-06 | 2018-07-12 | Henkel IP & Holding GmbH | Color care additive compositions |
US20220152572A1 (en) * | 2020-11-19 | 2022-05-19 | The Procter & Gamble Company | Consumer product comprising biodegradable delivery particles |
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2023
- 2023-05-22 WO PCT/EP2023/063566 patent/WO2023232513A1/en unknown
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Publication number | Priority date | Publication date | Assignee | Title |
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US20140017287A1 (en) | 2009-09-18 | 2014-01-16 | International Flavors & Fragrances Inc. | Purified polyurea capsules, methods of preparation, and products containing the same |
WO2016172699A1 (en) | 2015-04-24 | 2016-10-27 | International Flavors & Fragrances Inc. | Delivery systems and methods of preparing the same |
WO2017102306A1 (en) * | 2015-12-15 | 2017-06-22 | Unilever Plc | Fabric conditioning composition |
US20180195024A1 (en) * | 2017-01-06 | 2018-07-12 | Henkel IP & Holding GmbH | Color care additive compositions |
US20220152572A1 (en) * | 2020-11-19 | 2022-05-19 | The Procter & Gamble Company | Consumer product comprising biodegradable delivery particles |
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