KR20150059579A - Liquid detergent composition - Google Patents

Abstract

The present invention relates to a liquid detergent composition, and more specifically, to a liquid detergent composition which comprises an anionic surfactant, a nonionic surfactant, an electrolyte, a solubilizer, and a viscosity agent, secures viscoelasticity due to a suitable concentration ratio of the anionic surfactant and the nonionic surfactant, can be stored for a long period of time while maintaining high transparency due to having excellent phase stability, has excellent usability and cleaning capability, and is economical. The liquid detergent composition comprises: 1 to 30 wt% of an anionic surfactant; 1 to 40 wt% of a nonionic surfactant; 0.5 to 20 wt% of an electrolyte; 5 to 40 wt% of a solubilizer; and 0.01 to 10 wt% of a viscosity agent.

Description

[0001] LIQUID DETERGENT COMPOSITION [0002]

The present invention provides a condition suitable for cleaning during dilution, thereby adjusting a portion overused by a consumer to provide a satisfactory performance by not being used for cleaning in a cleaning process, reducing the amount of waste of a wasted cleaning component, To a liquid detergent composition which maintains transparency of the liquid detergent and is excellent in phase stability.

Conventional powdered detergents have been poor in storage stability due to scattering of powder, absorption of moisture during long-term storage and formation of lumps, and the use of liquid laundry detergents is increasing in domestic and worldwide. However, these liquid detergents require appropriate viscosity in terms of being able to be used and stored for a long time without deterioration such as phase separation due to storage stability and viscosity stability under various climatic conditions. Also, detergent and alkali substance . Thus, in the case of liquid detergents, thickeners, surfactants and alkaline materials are included which make the phase of the liquid detergent opaque.

However, consumers have been perceived to want liquid detergent compositions to be relatively clear, and in particular transparent compositions are advantageously used to provide an aesthetic indication of purity to the consumer. Therefore, it has been required to develop a liquid detergent composition which can maintain the proper viscosity while maintaining the transparency of the liquid detergent, thereby increasing the cleaning power while securing the phase stability.

In order to remedy this, U.S. Pat. No. 6,897,253 discloses a substantially crosslinked alkali-swellable acrylate copolymer rheology modifier, water, an alkaline substance, and a compound which is effective to stabilize or suspend a substantially insoluble compound A positive surfactant is disclosed.

Such cross-linked carboxyl group-containing polymers have heretofore been used as thickeners for various aqueous solutions. For example, US Patent Nos. 2798053, 2923692, 4267103, and 4923940 disclose copolymers of?,? - unsaturated carboxylic acids and polyallyl ethers, such as acrylic acid, In Japanese Patent No. 2958679, a copolymer of an alpha, beta -unsaturated carboxylic acid and hexaallyltrimethylenetrisulfone is known as a crosslinking type carboxyl group-containing polymer.

These crosslinking type carboxyl group-containing polymers are used in neutralization tanning liquids after neutralization with alkali to dissolve in water and are used for the use of suspension stabilizers such as thickeners, emulsions and suspensions. When the crosslinking type carboxyl group-containing polymer is dissolved in water Precipitates tend to be formed, and once a mass is formed, a gel phase layer is formed on the surface thereof, which slows down the penetration of water into the interior thereof, which makes it difficult to obtain a homogeneous solution.

In response to such a problem, US Pat. No. 6,770,612 discloses a system in which a water-soluble polymer not crosslinked in a conventional structured system is used and a variety of alkali materials are applied by using a thickener, but specifically, the detergent and viscosity of the liquid detergent composition are maintained But is not concerned with a clear liquid detergent composition, a solution is needed.

It is an object of the present invention to provide a liquid detergent composition comprising an anionic surfactant, a nonionic surfactant, an electrolyte, a solubilizing agent and a thickening agent, And a liquid detergent composition which is improved in transparency that is easy to use.

However, the problems to be solved by the present invention are not limited to the above-mentioned problems, and other matters not mentioned can be clearly understood by those skilled in the art from the following description.

The first aspect of the present invention relates to a composition comprising 1 to 30% by weight of an anionic surfactant; 1 to 40% by weight of a nonionic surfactant; 0.5 to 20% by weight of an electrolyte; From 5 to 40% by weight of a solubilizing agent; And 0.01 to 10% by weight of a thickener, wherein the anionic surfactant: the nonionic surfactant is in a weight ratio of 1: 2 to 1: 3.

The electrolyte may be a monovalent or multivalent organic or inorganic acid salt such as chloride, bromide, iodide, acetate, bicarbonate, phosphate, citrate, sulfate, polyphosphate, pyrophosphate, triphosphate, tetrapyrate, Polysilicate, carbonate, hydroxide, and alkali metal salt.

The thickening agent may be a non-crosslinked water-soluble acrylic copolymer.

The liquid detergent composition may have a transparency of 5 to 60 NTU.

The liquid detergent composition may further comprise at least one additive selected from the group consisting of organic solvents, detergent auxiliaries, stabilizers, enzymes, preservatives, flavors, dyes, viscosity regulators, chitosan, .

The present invention provides a liquid detergent composition excellent in viscosity and stability by securing an appropriate viscoelasticity by using an appropriate concentration ratio of an anionic surfactant and a nonionic surfactant, and it is possible to provide a liquid detergent composition which is stored for a long period of time It is possible to maintain the stability and transparency of the liquid detergent even when the liquid detergent is stored and used for a long period of time.

Hereinafter, embodiments of the present invention will be described in detail. In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. In addition, terms used in this specification are terms used to appropriately express the preferred embodiments of the present invention, which may vary depending on the user, the intention of the operator, or the practice of the field to which the present invention belongs. Therefore, the definitions of these terms should be based on the contents throughout this specification.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise.

The liquid detergent composition of the present invention comprises 1 to 30% by weight of an anionic surfactant; 1 to 40% by weight of a nonionic surfactant; 0.5 to 20% by weight of an electrolyte; From 5 to 40% by weight of a solubilizing agent; And 0.01 to 10% by weight of a thickener, wherein the anionic surfactant: the nonionic surfactant has a weight ratio of 1: 2 to 1: 3.

The anionic surfactant is preferably a sulfonate-based anionic surfactant, a sulfate-based anionic surfactant, or a mixture thereof.

It is known that an ionic surfactant, especially an anionic surfactant, has excellent detergency when it is required to exhibit cleaning power. When two or more of them are used in combination with a single anionic surfactant, the synergistic effect It is preferable to use a mixture of a sulfonate-based anionic surfactant and a sulfate-based anionic surfactant.

Preferred sulfonate anionic surfactants include alkylbenzenesulfonates, olefin sulfonates, secondary alkanesulfonates, alpha sulfonate methyl / ethyl esters, or alkyl benzene sulfonates in which the alkyl group is a linear or branched alkyl having 9 to 18 carbon atoms, May be used. More specifically, an alkylbenzene sulfonate having 9 to 15 carbon atoms, preferably an alkylbenzene sulfonate having an alkyl group having 12 to 15 carbon atoms, or an alkane sulfonate having 12 to 18 carbon atoms, preferably an alkane sulfone having 14 to 16 carbon atoms Or an olefin sulfonate having 8 to 18 carbon atoms, preferably an olefin sulfonate having 12 to 18 carbon atoms can be used. Other sulphonate-based anionic surfactants may also be used, such as the alpha-sulphonate methyl / ethyl ester of alpha-sulfo fatty acids, such as coconut oil, palm kernel oil and tallow fatty acid.

The preferred sulfate anionic surfactant may be an alkyl ether sulfonate represented by the following formula (1)

In the formula (1)

R ₁ is an alkyl group having a carbon number of 8 to 16, preferably an alkyl group having a carbon number of 10 to 16, more preferably an alkyl group having a carbon number of 12 to 14,

M is a cationic salt, preferably sodium, potassium, ammonium or alkanolammonium, more preferably sodium,

n is an integer of 1 to 6, preferably an integer of 1 to 5, more preferably an integer of 2 to 5.

Other preferred sulfate anionic surfactants include sulfuric acid monoester compounds of primary or secondary alcohols having 8 to 18 carbon atoms, sulfuric acid monoester compounds of aliphatic primary alcohols containing 1 to 6 ethylene oxides, ethoxylated secondary alcohols Sulfuric acid monoester compounds of alkylphenols, sulfated fatty acid alkanolamide, sulfated fatty acid monoglycerides or mixtures thereof may be used.

The nonionic surfactant, which is one component of the liquid detergent composition of the present invention, can be usually those used in the field. Preferable examples of the nonionic surfactant include primary or secondary alcohol type nonionic surfactants having a linear or branched alkyl or alkenyl group having 8 to 22 carbon atoms and containing from 1 to 25 mol of ethylene oxide, Or an alkylpolyglycoside-based nonionic surfactant having a branched alkyl or alkenyl group may be used. As the fatty acid amide type nonionic surfactant, a fatty acid amide having a linear or branched alkyl or alkenyl group having 8 to 22 carbon atoms and having a fatty acid amide type in the form of ammonia amide, monoethanol amide, diethanol amide or isopropanol amide Nonionic surfactants can be used.

The surfactant content of the liquid detergent composition of the present invention is 1 to 30% by weight of an anionic surfactant and 1 to 40% by weight of a nonionic surfactant, and the anionic surfactant: the nonionic surfactant is 1: 2 to 1: 3.

The content of the nonionic surfactant with respect to the content of the anionic surfactant may be 2 to 3 times. The surfactant monomers are combined to form a micelle. The micelle structure can be variously changed into spherical, rod-like, lamellar, and the like depending on the surfactant concentration and kind. Therefore, When the combination ratio of ion and anionic surfactant is in the above range, the surfactant shows proper physical property to form an appropriate micelle structure.

The anionic surfactant may be contained in an amount of preferably 1 to 30% by weight, more preferably 1 to 20% by weight based on the liquid detergent composition of the present invention. The nonionic surfactant is preferably contained in an amount of 1 to 40% by weight, more preferably 5 to 30% by weight.

The liquid detergent composition of the present invention includes an electrolyte, and in the composition containing the surfactant, the electrolyte exhibits an increasing effect, and exhibits various effects such as enhancing dispersion stability of the effective particles and bubbles.

Examples of the electrolyte include salts of monovalent or multivalent organic or inorganic acids such as chloride, bromide, iodide, acetate, bicarbonate, phosphate, citrate, sulfate, polyphosphate, pyrophosphate, triphosphate, tetraphosphate, , Polysilicates, carbonates, hydroxides, alkali metal salts or mixtures thereof may be used. More preferably, chlorides, nitrates, bicarbonates, phosphates, silicates, carbonates or mixtures thereof may be used. Sodium, potassium, calcium, magnesium, zinc, aluminum, iron and the like can be used as the counter cation of the anion of such salt.

The content of the electrolyte is preferably 0.5 to 20% by weight, more preferably 1 to 15% by weight based on the liquid detergent composition. When the content of the electrolyte is less than 0.5% by weight, the effect of increasing the electrolyte and the stability of the dispersion are lowered. When the content of the electrolyte is more than 20% by weight, the salts of the electrolyte may interfere with the structuring of the surfactants.

As a constituent component of the liquid detergent compositions of the present invention, the solubilizer serves to maintain the surfactant in a stable state. Examples of the solubilizer include polyethylene glycol, glycerin, propylene glycol, alkanol having 1 to 4 carbon atoms, alkyl Aryl sulfonates, carboxylic acid sulfates, carboxylic acid sulfonate salts, urea, hydrocarboxylates, carboxylates or mixtures thereof may be used. The alkanol having 1 to 4 carbon atoms may be methanol, ethanol, propanol, isopropanol, linear or branched butanol, and the like.

The solubilizing agent is used in an amount of 5 to 40% by weight, more preferably 10 to 25% by weight based on the liquid detergent composition. If the solubilizing agent is less than 5% by weight, the solubilizing effect is not sufficiently exhibited. There is a fear that the viscosity becomes very low.

The liquid detergent composition of the present invention may contain a thickener. As the thickener for the surfactant solution, inorganic salts such as sodium chloride, water-soluble polymers such as hydroxyethyl cellulose and xanthan gum, and fatty acid alkanolamides are known. Among them, the fatty acid alkanolamide is used in combination with a surfactant such as an alkyl ether sulfate type surfactant as well as a thickening effect and is widely used because it has a bubble increasing effect.

Conventional thickener acts to make the upper layer thicker and maintain the state of separation during standing. Thickening agents that may be used include hydrophobically modified polyethers. Examples of this class of thickeners that may be used include PEG (160) sorbitan triisostearate (Rheodol TWS -399C from Kao Chemicals) or PEG-120 pentaerythrityl tetrastearate (Croda) But is not limited to. Other examples include Glucam DOE 120 (PEG 120 methyl glucose dioleate); Rewoderm (obtained from Rewo Chemicals) (PEG modified glyceryl cocoate, palmate or tallowate); Antil (TM) 141 (available from Goldschmidt).

Another class of suitable polymers is hydrophobically modified cellulose ethers including cellulose ethers having long pentanediyl chains such as hydroxyethyl cellulose, hydroxypropyl cellulose, and nonoxynyl hydroxyethyl cellulose (Amerchol Polymer HM 1500) But is not limited to these. Another class of suitable polymers is the hydrophobically modified acrylate copolymers such as Antil 208 (available from Goldschmidt) (Acrylate / Stearate-50 acrylate copolymer). Another class of suitable polymers is the hydrophobically modified polyurethanes, such as the acrylic type (available from Rhom and Haas) (e.g. Acrysol RM-2020). Another class of suitable thickeners are xanthan gum, guar gum, and chemically modified guar gum.

As an embodiment of the present invention, among the examples of the thickener, a water-soluble acrylic copolymer which is non-crosslinked is preferable, and in particular, a non-cross-linked acrylic acid / ethylacrylate copolymer is used as a thickener Is preferably used. Conventionally, a thickener has been used to increase the viscosity of a liquid detergent composition, but the viscosity of the liquid detergent composition is not increased, and a falling phenomenon occurs to deteriorate the properties of the product. The technology of the existing patent uses phosphate which is a concern in terms of environment. The non-crosslinked water-soluble acrylic copolymer used as a conventional thickener when the proper concentration ratio of an alkaline substance other than phosphate to a nonionic surfactant and an anionic surfactant is used according to the present invention maintains the transparency of the liquid detergent composition, . The effect of the present invention is that the non-crosslinked water-soluble acrylic copolymer acts to enhance the elasticity of the micelles generated when two or more surfactants are mixed, thereby stabilizing the structure of the surfactant to maintain a soluble and easily dispersible liquid detergent composition So that it can ultimately maintain visible transparency.

The thickener of the present invention may contain 0.01% to 10% by weight, preferably 0.1% to 5% by weight of the composition.

The liquid detergent composition of the present invention may have a transparency of 5 to 60 NTU. The transparency of the present invention has an NTU value of not more than 50, more preferably not more than about 40, as determined by the following transparency test .

The liquid detergent composition of the present invention may contain, in addition to the above-described components, organic solvents, detergent auxiliaries, stabilizers, enzymes, preservatives, fragrances, dyes, viscosity controlling agents, chitosan, A metal ion additive, and a pH adjusting agent.

Mono- or polyhydric alcohols may be used as the organic solvent. Specifically, methanol, ethanol, propanol, isopropanol, butanol, a mixture thereof and the like having a carbon number of 1 to 4 can be used.

The fragrance can be a normally used aromatic compound, and can be chemically synthesized or extracted from natural materials and known in the art.

The preservative is not limited to ethanol, phenoxyethanol, benzisothiazolinone, methylchloroisothiazolinone, methylisothiazolinone, pentyneol, parabens, sodium benzoate and the like.

The pH adjusting agent is excellent in the effect of removing stains and can be any low molecular weight organic or any organic compound which provides neutrality. Preferred are monoethanolamine, diethanolamine, triethanolamine, sodium hydroxide, a liquid alkaline agent of potassium hydroxide, and citric acid, malic acid, salicylic acid, tartaric acid, lactic acid, acetic acid, sorbic acid and benzoic acid.

The metal ion sulfonating agent may be used to increase the formulation and phase stability of the liquid composition of the present invention and may be selected from the group consisting of EDTA, EDTA-2Na, EDTA-4Na, DTA, NTPA, phosphates, polyacrylic acid, gluconic acid, sorbates, At least one member selected from the group consisting of sulfur, nitrogen, and sulfur.

Further, the enzyme is used for further increasing the washing effect of the liquid detergent composition, and mainly alkaline proteolytic enzyme can be used, and specifically, it can be selected from the group consisting of protease, lipase, amylase, and mixtures thereof. The content of the enzyme is preferably 0.1 to 1% by weight, which is a typical range of the enzyme for the whole composition.

Hereinafter, the present invention will be described in more detail with reference to the following examples. However, the following examples are for illustrative purposes only and are not intended to limit the scope of the present invention.

● Examples and Comparative Examples prepared

A liquid detergent composition was prepared with the compositions and contents shown in Tables 1 and 2 below. And mixed by stirring so as to be a homogeneous liquid phase. As the components of Examples 1 and 2 in Table 1, sodium lauryl ether sulfate as an anionic surfactant and polyoxyethylene lauryl ether as a nonionic surfactant were mixed at a ratio of 1: 2 (Example 1) or 1: 3 (Example 2). As the solubilizing agent, propylene glycol 20% by weight, sodium bicarbonate was used as an electrolyte, and further, a pH adjusting agent and water were included. On the other hand, the comparative example in Table 2 uses only sodium sodium dodecylbenzenesulfonate as an anionic surfactant, and was prepared using 20% by weight of sodium triphosphate, a pH adjuster and water. In addition, Examples 1 and 2 and Comparative Examples all contain 0.21 wt% of the same amount of uncrosslinked acrylic acid / ethyl acrylate copolymer which is a non-crosslinked water-soluble polymer.

ingredient Example 1 Example 2 Non cross-linked acrylic acid / ethylacrylate copolymer
Non-crosslinkable water-soluble polymer 0.21 0.21 Sodium lauryl ether sulfate 10 5 Polyoxyethylene lauryl ether 20 15 Sodium hydroxide 10 10 Sodium bicarbonate 4 10 Propylene glycol 20 20 Benzisothiazolinone 0.05 0.5 water q.s q.s

ingredient Comparative Example Non cross-linked acrylic acid / ethylacrylate copolymer
Non-crosslinkable water-soluble polymer 0.21 Sodium dodecylbenzenesulfonate sodium 4.42 Sodium hydroxide 10 Sodium tripolyphosphate 20 Benzisothiazolinone 0.05 water q.s

Evaluation of Examples and Comparative Examples

The following evaluations were carried out on the liquid detergent compositions of the above Comparative Examples and Examples.

1. pH measurement

The pH values of the respective Examples and Comparative Examples were measured in order to confirm that transparency and stability were maintained even under alkaline conditions. The pH values were measured using a pH meter (Orion 550A) manufactured by Thermo Co., and the results are shown in Table 3 below.

division Example 1 Example 2 Comparative Example Product pH 9.05 9.10 11.2 1 g / L pH 8.80 8.9 10.6

In Table 3, it can be seen that the pH of Example 1, Example 2 and Comparative Example is high, and it is possible to compare the phase stability and transparency of the liquid detergent composition on the premise that the pH is high.

2. Evaluation of transparency

Transparency is measured in terms of the turbidity of the detergent stock solution at 455 nm using a HACH 2100AN Turbidimeter (according to USEPA method 180.1) and is shown in Table 4 below.

division Example 1 Example 2 Comparative Example Transparency (NTU) 31 37 opacity Transparency after 12 weeks 36.0 39.0 Phase separation

According to the above Table 4, although all of Example 1, Example 2 and Comparative Example contained 0.21 wt% of the same amount of the non-crosslinked water-soluble polymer, the anionic surfactant and the nonionic surfactant were mixed at an appropriate concentration ratio Examples 1 and 2 show that the liquid phase is transparent while the liquid phase is opaque in the comparative example that does not meet this ratio. This is because transparency is maintained not only in the presence of an uncrosslinked acrylic acid / ethyl acrylate copolymer used as a thickener, but also in an appropriate concentration ratio of an anionic surfactant and a nonionic surfactant of 1: 2 to 1: 3, To a high level.

3. Stability Assessment

Assuming conditions that may appear when the user uses and stores liquid detergent, storage stability is confirmed. Each of the liquid detergent compositions of Examples 1 and 2 and Comparative Example was placed in a transparent PET container in an amount of 100 g each, and kept under various conditions. In the visual observation at the time of appearance, the subject to be identified is checked for deterioration such as separation of the contents, and the results are shown in Table 5 below.

4. Evaluation of cleaning force

The detergency of the liquid detergent was evaluated by a Terg-o-tometer for laboratory use. Washing force The measuring temperature was 20 ° C at 100 rpm. The amount of sample used was 1 g of sample in 1 L of water, washing time was 10 minutes, and rinsing was carried out twice for 3 minutes each. The artificial contaminated cloth used in the measurement was a wet artificial contaminated cloth of the Japan Cleanup Association. Wet artificial contamination was 5cm x 5cm and 8 pieces were used per sample. For each contaminated cloth before and after washing, the washing effect was measured by measuring the Wb value with a color difference meter (Nippon denshoku) and using the following formula 1. The comparative detergent was a standard liquid detergent of Korean industrial standard synthetic detergent. In comparison with the detergent, the washing detergent showed good results when the detergent was superior to the detergent, and the failure was indicated when the detergent was not predominant.

5. Results of stability and detergency evaluation

Table 5 below shows Example 1, Example 2 and Comparative Example by confirming washing power and stability for 3 months.

division Example 1 Example 2 Comparative Example Appearance Transparency Transparency opacity Cleansing power Good Good Good Long term stability 3 months stability stability Phase separation
Separated from week 8

As can be seen from Table 5, both Example 1, Example 2, and Comparative Example showed good results in terms of cleaning power, which is a basic performance of liquid detergents. However, in the stability evaluation, On the other hand, in Examples 1 and 2 in which the nonionic surfactant and the anionic surfactant were mixed in an appropriate ratio, the liquid phase was stable and transparency was maintained even after 3 months.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, Do. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined by the equivalents of the claims, as well as the claims.

Claims (5)

1 to 30% by weight of an anionic surfactant;
1 to 40% by weight of a nonionic surfactant;
0.5 to 20% by weight of an electrolyte;
From 5 to 40% by weight of a solubilizing agent; And
0.01 to 10% by weight of a thickener;
Said anionic surfactant: said nonionic surfactant being in a weight ratio of 1: 2 to 1: 3.
The method according to claim 1,
The electrolyte may be a monovalent or multivalent organic or inorganic acid salt such as chloride, bromide, iodide, acetate, bicarbonate, phosphate, citrate, sulfate, polyphosphate, pyrophosphate, triphosphate, tetrapyrate, Polysilicate, carbonate, hydroxide, and alkali metal salt.
The method according to claim 1,
Wherein the thickener is a non-crosslinked water-soluble acrylic copolymer.
The method according to claim 1,
Wherein the liquid detergent composition has a transparency of 5 to 60 NTU.
The method according to claim 1,
Wherein the liquid detergent composition further comprises at least one additive selected from the group consisting of organic solvents, detergent auxiliaries, stabilizers, enzymes, preservatives, fragrances, dyes, viscosity modifiers, chitosan, metal ion roughening agents and pH adjusting agents.