EP2240149A1

EP2240149A1 - Easy-to-suspend hydrophobing agents

Info

Publication number: EP2240149A1
Application number: EP08868060A
Authority: EP
Inventors: Jürgen HAUK
Original assignee: Baerlocher GmbH
Current assignee: Baerlocher GmbH
Priority date: 2007-12-27
Filing date: 2008-12-15
Publication date: 2010-10-20
Also published as: MY152944A; WO2009083127A1; DE102007062774A1; BRPI0821632B1; BRPI0821632A2; US20110014471A1; US8323795B2

Abstract

The invention relates to solids powders comprising particles having an average particle size of 0.1 to 50 µm with predominantly a core-shell structure, wherein the core comprises at least one water-insoluble fatty acid salt and the shell at least one anionic, cationic or non-ionic emulsifier, and the solids powder when introduced into water or at least one polar organic solvent or a mixture comprising water and at least one polar organic solvent, at a temperature of 23°C while exposed to a mechanical force, forms a complete dispersion within 60 minutes or less.

Description

December 15, 2008 Baerlocher GmbH BA70374PC FI / bg

EASILY SUSPENSIBLE HYDROPHOBIC EQUIPMENT

The present invention relates to a solid powder comprising particles having an average particle size of 0.1 to 50 microns with a predominantly core-shell structure, wherein the core comprises at least one water-insoluble fatty acid salt and the shell at least one anionic, cationic or nonionic emulsifier and the solid powder at entry in water or at least one polar organic solvent or a mixture containing water and at least one polar organic solvent, with a temperature of 23 ° C under mechanical force within 60 minutes or less forms a complete dispersion.

The use of fatty acid compounds for the hydrophobization of surfaces has been known for a long time. For this purpose, the corresponding fatty acid compounds are usually converted under high shear effort, optionally with the addition of an emulsifier or an emulsifier mixture in an aqueous dispersion. This dispersion is then further processed accordingly to achieve a hydrophobization of the desired surface.

However, a problem with the procedure practiced so far is that the hydrophobic properties of the materials used for hydrophobization are extremely difficult to convert into aqueous dispersions. In particular, when using fatty acid salts as hydrophobing agents, the phenomenon often occurs that the fatty acid compounds float on the water surface and can be converted into a complete dispersion only with great mechanical effort. This behavior leads both to increased expenditure of time and to higher costs for the user. It is an object of the present invention to provide a solid powder which is suitable for hydrophobing and which does not have the disadvantages encountered in previous practice. In particular, the object of the present invention was to provide a solid powder which is suitable for the hydrophobic treatment of surfaces and which can be converted into a complete dispersion by the user in a short time and with as little mechanical effort as possible.

It has now been found that especially solid particles with a core-shell structure, the o. G. To solve the problem when the core comprises at least one water-insoluble fatty acid salt and the shell at least one anionic, cationic or nonionic emulsifier.

The present invention therefore provides a solid powder comprising particles having an average particle size of 0.1 to 50 microns with a predominantly core-shell structure, wherein the core comprises at least one water-insoluble fatty acid salt and the shell at least one anionic, cationic or nonionic emulsifier and the solid powder when introduced into water or at least one polar organic solvent or a mixture containing water and at least one polar organic solvent, with a temperature of 23 ° C under mechanical force within 60 minutes or less forms a complete dispersion.

The solid powder according to the invention is characterized in that it is dispersible on entry into the water or at least one polar organic solvent or a mixture containing water and at least one polar organic solvent under mechanical force. By an "entry in water or at least one polar organic solvent or a mixture containing water and at least one polar organic solvent" is in For the purposes of the present invention, the entry into a composition is understood to comprise at least a portion of water or at least one polar organic solvent or a mixture containing water and at least one polar organic solvent. Thus, the above entry in water or at least one polar organic solvent or a mixture containing water or at least one polar organic solvent in the context of the present invention, for example, the entry in water or a polar organic solvent or a mixture of two or more polar to understand organic solvents or a mixture containing water or at least one polar organic solvent, wherein the respective ingredients may make up a total of substantially 100% of the mixture in which the entry is made. However, it is also envisaged according to the invention that the entry be made into a composition comprising less than 100% by weight of water or at least one polar organic solvent or a mixture containing water and at least one polar organic solvent, based on the total mixture. %, for example, at a level of 80, 60, 40, 20 or around 10% by weight only. The proportion lacking 100% by weight may comprise, for example, oligomeric or polymeric ingredients or other auxiliaries, fillers and the like, as contained, for example, in coating compositions such as emulsion paints or water-based paints.

In the context of the present text, "mechanical force action" is understood to mean a measure resulting in a movement of the mixture of water and solid powder, which is preferably sufficient to form a complete dispersion within 60 minutes suitable stirring devices, Ultraturrax, dissolver disc or other methods such as ultrasound. In the context of the present invention, a "complete dispersion" is understood as meaning a state in which the solid powder is substantially completely wetted in the water and no water is present even after a service life of at least one minute, preferably at least 5 minutes or at least 1 hour settle unwetted particles.

In the context of the present invention, a core-shell structure is understood to mean a structure in which the composition of the solid particle, starting from the center of the particle, changes towards the edges in such a way that the edge has a different composition than the center , Such changes may be made in the context of the present invention continuously or substantially discontinuously or as a mixture of both phenomena. In the context of the present invention, the term "predominant core-shell structure" is understood to mean that the core-shell structure can be detected for at least about 40% of the surface of the solid-state fluid Electron microscopic examination of the Feststoffieil- Chen done.

In the context of the present invention, a solid powder according to the invention comprises particles having an average particle size of about 0.1 to about 50 μm, for example about 0.5 to about 30 or about 1 to about 20 μm. Suitable methods for determining the particle size are known to the person skilled in the art, the laser diffractometry being particularly mentioned here.

The individual particles of a solid powder of the invention comprise a core consisting of a core material containing at least one water-insoluble fatty acid salt. The core itself may consist, for example, of a corresponding water-insoluble fatty acid salt or a mixture of 2 or more fatty acid salts, of which at least one must be water-insoluble, or a mixture of a water-insoluble fatty acid salt and one or more further compounds. However, it is also possible in the context of the present invention that the core itself already has a core-shell structure. For example, it is provided according to the invention that the core used is a structure which in turn has as its core an inorganic or organic carrier, for example a filler such as chalk or titanium dioxide, which has on its surface a corresponding water-insoluble fatty acid salt. Such structures have the advantage that in many cases they require a significantly reduced proportion of expensive fatty acid salts with identical effectiveness with respect to the hydrophobing effect and are thus significantly more economical. Such core structures are used in particular in systems in which the thermal load does not exceed the melting point of the fatty acid salts or of the fatty acid salt used.

Moreover, it has also proven useful if the core comprises an inorganic or organic carrier material which has a porous, for one or more further ingredients of the core material, for example absorbent structure. Suitable materials are e.g. Zeolites or layered compounds such as hydrotalcites and the like.

In the context of a further embodiment of the present invention, the core material of a solid powder according to the invention therefore contains at least one organic or inorganic carrier material.

Suitable fatty acid salts in the context of the present invention are the salts of the aliphatic carboxylic acids of the formula (I) R ¹ CO-OH (I)

in which R CO is an aliphatic, linear or branched acyl radical having 6 to 22 carbon atoms and 0 and / or 1, 2 or 3 double bonds.

Typical examples of suitable fatty acids are caproic acid, caprylic acid, 2-ethylhexanoic acid, capric acid, lauric acid, isotridecanoic acid, myristic acid, palmitic acid, palmitoleic acid, stearic acid, isostearic acid, oleic acid, elaidic acid, petroselinic acid, linoleic acid, linolenic acid, elaeostearic acid, arachidic acid, gadoleic acid, Behenic acid and erucic acid and their technical mixtures, eg in the pressure splitting of natural fats and oils, in the reduction of aldehydes from the Roelen oxo synthesis or the dimerization of unsaturated fatty acids.

Preference is given to the salts of technical fatty acids having 12 to 18 carbon atoms, for example coconut, palm, palm kernel or tallow fatty acid.

In a further embodiment, the core has a fatty acid salt with a metal cation or an ammonium cation or a mixture of fatty acid salts of at least two different metal cations or two different ammonium cations or a mixture of at least one metal cation and at least one ammonium cation, the metal cations being selected from the group consisting of Alkali metals, alkaline earth metals, zinc, aluminum and rare earths are selected.

As part of the core according to the invention are the salts of the saturated and the salts of unsaturated fatty acids. It may be preferable to However, in some cases, it has also proven to be advantageous to use the salts of unsaturated fatty acids.

Suitable metal cations for forming the fatty acid salts are, in particular, metal cations selected from the group of cations of alkali metals, alkaline earth metals, zinc, aluminum and rare earth metals.

Preferred alkali metal salts are the salts of lithium, sodium and potassium. Preferred alkaline earth metal salts are the salts of magnesium, calcium, strontium and barium. Among the rare earth salts, cerium and lanthanum are particularly suitable.

In a preferred embodiment of the invention, the fatty acid salts are at least one fatty acid salt from the group of alkali metal salts or at least one fatty acid salt from the group of alkaline earth metal salts or a fatty acid salt of at least one rare earth metal or a mixture of two or more more of that. It may be preferred if a core according to the invention contains at least one alkali metal salt or at least one alkaline earth metal salt or a mixture of both. For example, fatty acid salt mixtures containing sodium or potassium and calcium or magnesium salts corresponding to suitable fatty acids are suitable.

In a further preferred embodiment, for example, a mixture of sodium and calcium salts is used. In a further preferred embodiment of the invention, a solid powder according to the invention can be a mixture of about 10 to about 50% by weight of sodium salts and about 90 to about 50% by weight of calcium salts, based on the total weight of the fatty acid salts in the fatty acid salt mixture. Particularly preferred is the use of sodium and calcium salts in a weight ratio of about 1: 2. If a core material according to the invention contains fatty acids of different chain lengths, it may in principle be possible for different metal cations to be present essentially randomly distributed to the fatty acids with different chain lengths. If a core material according to the invention contains saturated and unsaturated fatty acids, it may in principle be possible for different metal cations to be present essentially randomly distributed among the saturated and unsaturated fatty acids. It is, however, also provided in the context of the present invention that different fatty acids, which differ, for example, in chain length or in saturation, have identical cations, for example identical metal cations or different cations distributed in a statistically significant manner.

For example, fatty acid salts useful in a core material useful in this invention are obtained when a grease or oil is combined with a suitable metal compound or a mixture of two or more suitable metal compounds, for example metal oxides, metal hydroxides, metal carbonates or metal salts of mineral acids, for example, sodium hydroxide or calcium hydroxide or both.

The amounts of the metal salts are selected, for example, stoichiometrically to the amounts of the desired salts. In a particular embodiment of the invention, the immediate process product of such a reaction can be used as core material. In this case, no further purification steps are required after the hydrolysis step.

As cations in core materials suitable according to the invention, in the context of the present invention, in principle all compounds which, by appropriate reaction, lead to an ammonium salt of the corresponding fatty acid are suitable. In the context of the present text, ammonia is also referred to as "amine." Ammonium salts according to the invention can be obtained, for example, by appropriate reaction of amines or amides, such as alkyl monoamines. mines, alkyl diamines, alkyl polyamines, dialkylamines or polyalkylamines. Suitable ammonium salts are therefore derived, for example, from primary mono- or polyamino compounds having from 2 to about 40, for example from 6 to about 20, carbon atoms. These are, for example, ammonia, methylamine, ethylamine, n-propylamine, i-propylamine, n-propylamine, sec-propylamine, tert-butylamine, the isomeric pentylamines, hexylamines, heptylamines and their higher homologues with 8, 9, 10 , 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21 or 22 carbon atoms, for example stearylamine, 1-aminoisobutane, substituted amines having 2 to about 20 carbon atoms, such as 2- (N , N-dimethylamino) -l-aminoethane. Suitable diamines are, for example, have a molecular weight of about 32 to about 200 g / mol, wherein the corresponding diamines have, for example, two primary, two secondary or one primary and one secondary amino group. Examples of these are diaminoethane, the isomeric diaminopropanes, the isomeric diaminobutanes, the isomeric diaminohexanes, piperazine, 2,5-dimethylpiperazine, armo-3-aminomethyl-3,5,5-trimethylcyclohexane (isophoronediamine, IPDA), 4,4'-diaminodicyclohexylmethane , 1,4-diaminocyclohexane, aminoethylethanolamhi, hydrazine, hydrazine hydrate or triamines such as diethylenetriamine or 1,8-diamino-4-aminomethyloctane. Triethylamine, tributylamine, dimethylbenzylamine, N-ethyl, N-methyl, N-cyclohexylmorpholine, dimethylcyclohexylamine, dimorpholinodiethyl ether, 1,4-diazabicyclo [2,2,2] octane, 1-azabicyclo [3,3,0] octane, N, N, N ', N'-tetramethylethylenediamine, N, N, N', N'-tetramethylbutanediamine, N ₅ N, - N ', N'-tetramethylhexanediamine-1,6, pentamethyldiethylenetriamine, tetramethyldi- aminoethyl ether, Bis (dimethylaminopropyl) urea, N, N'-dimethylpiperazine, 1, 2-dimethylimidazole or di (4-N, N-dimethylaminocyclohexyl) methane.

Also suitable are aliphatic amino alcohols having 2 to about 40, preferably 6 to about 20 C atoms, for example triethanolamine, tripropanolamine, tributanolamine, tripentanolamine, 1-amino-3,3-dimethyl-pentane-5-ol, 2-aminohexane-2 ', 2 "-diethanolamine, 1-amino-2,5-dimethylcyclohexan-4-ol-2-aminopropanol, 2-aminobutanol, 3-aminopropanol, 1-amino-2-propanol, 2- 55

Amino-2-methyl-1-propanol, 5-aminopentanol, 3-aminomethyl-3,5,5-trimethylcyclohexanol, 1-amino-1-cyclopentan-methanol, 2-amino-2-ethyl-1,3-propanediol, 2- (dimethylaminoethoxy) ethanol, aromatic-aliphatic or aromatic-cycloaliphatic amino alcohols having 6 to about 20 C atoms, wherein as aromatic structures heterocyclic or isocyclic ring systems such as naphthalene or especially benzene derivatives such as 2-aminobenzyl alcohol, 3- (hydroxymethyl ) aniline, 2-amino-3-phenyl-1-propanol, 2-amino-1-phenylethanol, 2-phenylglycinol or 2-amino-1-phenyl-1,3-propanediol and mixtures of two or more such compounds. Also suitable as ammonium salts are, for example, compounds in which the amino group is bonded to a substituted aromatic or heteroaromatic system, for example aminobenzoic acid, aminosalicylic acid or aminopyridinecarboxylic acid and suitable derivatives thereof.

In the context of the present invention, further materials are used as core materials, which in turn can themselves serve as a carrier material for a hydrophobizing fatty acid compound, in particular a fatty acid salt having a hydrophobic effect. Suitable carrier materials are, for example, inorganic carriers such as chalk or titanium dioxide, inorganic porous carriers such as montmorillonite, bleaching earth and the like, organic carriers such as starch, microcellulose and the like, as well as zeolites or hollow microspheres or mixtures of two or more thereof.

Moreover, it is provided in the context of the present invention that the core material, based on the total weight of the fatty acid salts in the

Core material, at least 1 wt .-%, for example 5 wt .-% or more or 10

Wt% or more or 15 wt% or more or 20 wt% or more or

25 wt% or more, or 30 wt% or more or 35 wt% or more or 40 wt% or more or 45 wt% or more, or 50 wt% or more, or 55% by weight or more or 60% by weight or more or 65% by weight or more, or 70% or more or 75% or more or 80% or more or 85% or more by weight of fatty acid salts containing at room temperature a water solubility of less than 1 g / 1, preferably less than 0.1 g / l. For example, a core material usable in the invention contains fatty acids having a chain length of about 12 to about 24 carbon atoms. It has been found to be advantageous if, if the core material contains fatty acids having a chain length of 16 carbon atoms or less, these fatty acids in the form of their alkaline earth metal salts or salts of rare earth to the effect that their water solubility is below the above maximum values ,

A usable in the context of the present invention solid particles in addition to a core according to the o. G. Definition still a shell. The shell in this case has at least one anionic, cationic or nonionic emulsifier which exhibits an effect such that the solid powder when introduced into water or at least one polar organic solvent or a mixture containing water and at least one polar organic solvent, having a temperature of 23 ° C under mechanical force within 60 minutes or less forms a complete dispersion.

Suitable inorganic emulsifiers in the context of the present invention are in principle all emulsifiers which fulfill the aim set according to the invention with regard to the emulsifiability of the solids in water. For example, the salts of fatty acids, in particular the salts of fatty acids having a chain length of 8 to 17 carbon atoms, are particularly suitable. This is particularly preferred in the context of the present invention when the proportion of such fatty acid salts in the shell, based on the total amount of the fatty acid salts in the shell, 20 wt .-% or more than 20 wt .-%. The fatty acid salts present in the shell are preferably at least 70% by weight to the total amount of fatty acid salts, alkali metal salts or amino salts present in the shell.

Also suitable as anionic emulsifiers and can be used as constituent of the shell are alkylbenzenesulfonates, alkanesulfonates, olefinsulfonates, alkyl ether sulfonates, glycerol ether sulfonates, α-methyl ester sulfonates, sulfo fatty acids, alkyl sulfates, fatty alcohol ether sulfates, glycerol ether sulfates, hydroxy mixed ether sulfates, monoglyceride (ether) sulfates, fatty acid amide ( ethers) sulfates, mono- and dialkyl sulfosuccinates, mono- and dialkyl sulfosuccinamates, sulfotriglycerides, amide soaps, ether carboxylic acids and their salts, fatty acid isethionates, fatty acid sarcosinates, fatty acid taurides, acyl lactylates, acyl tartrates, acyl glutamates, acyl laspartates, alkyl oligoglucoside sulfates, protein fatty acid condensates (in particular vegetable products based on wheat) and alkyl (ether) phosphates. If the anionic surfactants contain polyglycol ether chains, these may have a conventional, but preferably a narrow homolog distribution.

In addition, a shell which can be used according to the invention may contain nonionic surfactants in addition to or instead of the anionic surfactants.

Typical examples of suitable nonionic surfactants are fatty alcohol polyglycol ethers, alkylphenol polyglycol ethers, fatty acid polyglycol esters, fatty acid amide polyglycol ethers, fatty amine polyglycol ethers, alkoxylated triglycerides, mixed ethers, alk (en) yloligoglycosides, fatty acid N-alkylglucamides, protein hydrolysates (in particular wheat-based vegetable products ), Polyol fatty acid esters, sugar esters, sorbitan esters, polysorbates and amine oxides. If the nonionic surfactants contain polyglycol ether chains, these may have a conventional, but preferably a narrow homolog distribution. Also suitable as constituents of the shell are cationic surfactants or zwitterionic surfactants. Typical examples of cationic surfactants are quaternary ammonium compounds and esterquats, in particular quaternized fatty acid trialkanolamine ester salts. Typical examples of amphoteric or zwitterionic surfactants are alkyl betaines, alkyl amidobetaines, aminopropionates, aminoglycinates, imidazolinium betaines and sulfo betaines.

In a further embodiment of the invention, the proportion of fatty acid salts having 8 to 17 carbon atoms in the total fatty acid salts in the shell is more than 30, 50, 60, 70 or 80% by weight.

In a preferred embodiment of the invention, a shell of the invention contains fatty acid salts selected from the group consisting of fatty acid salts of caprylic, pelargonic, capric, lauric, laurolein, myristic, myristic, palmitic, palmitoleic, Margarine, undecylenic and palmitoleic acid. Other preferred fatty acids are linoleic acid and linolenic acid. In addition, for example, fatty acids are suitable which have one or more OH groups or one or more epoxy groups.

In a further embodiment of the invention, the sum of the proportions of the fatty acid salts of the caprylates, laurates and myristates in the total shell fatty acid salts amounts to more than 50% by weight. A solid powder according to the invention may contain, in addition to the constituents described above, further ingredients. For example, these are polyhydric alcohols. Polyhydric alcohols are compounds which have at least 2 OH groups. In principle, linear, branched, saturated or unsaturated and homocyclic or heterocyclic unsaturated alcohols are suitable as constituent of the solid powders according to the invention. However, it has proved to be advantageous in some cases, if as multivalent Alcohol compounds are used which have only carbon, hydrogen and oxygen as atomic constituents. The molecular weight of such polyhydric alcohols can range from about 62 (ethylene glycol) to several thousand, for example, about 100,000. A solid powder according to the invention can contain, for example, only one polyhydric alcohol or two or more polyhydric alcohols. The alcohols may differ, for example, in their molecular weight or in the number of OH groups or in several different features.

Suitable examples are polyhydric alcohols such as ethylene glycol, propylene glycol, butylene glycol, pentylene glycol, hexylene glycol, propane triol, trimethylolpropane, pentaerythritol, dihydroxycyclohexane, diethylene glycol, triethylene glycol and the dimers, trimeric or oligomeric derivatives of the abovementioned dialcohols, oligoglycerol, polyglycerol, Polyvinyl alcohol and the like.

E may be preferred according to the invention if a solid powder in the shell contains a low molecular weight polyhydric alcohol having 2, 3 or 4 OH groups, in particular propane triol.

The proportion of polyhydric alcohol or polyhydric alcohols, if these compounds are present in the solid powder according to the invention, is up to about 40% by weight, in particular about 1 to about 30 or about 5 to about 20 or about 8 to about 13% by weight. %, preferably as part of the shell.

In addition, a solid powder according to the invention may contain one or more monoalcohols, for example fatty alcohols. Suitable here are linear or branched, saturated or unsaturated aliphatic, monofunctional alcohols, in particular methanol, ethanol, the isomers of propanol, butanol or hexanol and fatty alcohols having about 8 to about 22 carbon atoms, for example octanol, decanol, dodecanol, tetradecanol , Hexadecanol or octadecanol. The fatty alcohols mentioned are obtained, for example, by reductants. tion of natural fatty acids available and can be used both as pure substances as well as in the form of their technical mixtures. For example, linear monoalcohols and in particular those having about 4 to about 18 carbon atoms are very suitable. Instead of the linear or branched aliphatic alcohols or in admixture with these, it is also possible to use monoalkylpolyether alcohols of different molecular weight, preferably in the molecular weight ranges from about 1,000 to about 2,000.

The solid powder according to the invention can in principle be used for any purpose. However, it has been found within the scope of the present invention that the solid powder is excellently suited to impart certain properties to surfaces in terms of their interaction with water or polar solids, in particular to hydrophobize these materials. A solid powder according to the invention is therefore suitable as hydrophobicity - means. If reference is made in the context of the present text to water repellents, this is to be understood as referring to the solid powders according to the invention.

In a further embodiment of the invention, the solid powder contains additives. Suitable additives are, for example, solvents, binders, solubilizers, fillers, other water repellents, surfactants, emulsifiers, viscosity improvers, pigments, dyes, preservatives, gelling agents, anti-caking agents, pH modifiers, buffers, reaction accelerators, reaction retarders, colloids, polymers or air entraining agents or gemi - see two or more of them included.

A solid powder according to the invention may, for example, additionally contain binders, surfactants, emulsifiers, colloids or polymers. These additives are included, for example, to improve the dispersibility and miscibility of the solid powder with another material, in particular a building material. According to the invention applicable additives are fatty Acid derivatives, such as esters, waxes, polymers, in particular ionic polymers and detergents.

The binders used are, for example, water-soluble or water-dispersible binders. Such substances are known in the literature. Materials are preferably used which have a waxy, highly viscous or solid consistency at room temperature, ie 20 to 25 ⁰ C and have a melting point of 25 ° C to 150 ⁰ C. Examples of common corresponding bonding materials are polyvinyl alcohol, methyl cellulose, carboxymethyl cellulose, ethoxylated fatty alcohols or mixtures thereof. In addition, fatty acid esters or film-forming polymers can be used. The bonding materials should not interfere, or as little as possible, with the hydration process of the building material when water is introduced.

Preferred colloids are partially hydrolyzed and fully hydrolyzed polyvinyl alcohols; Polyvinyl pyrrolidones, polyvinyl acetals, polysaccharides in water-soluble form such as starches (amylose and amylopectin), celluloses and their carboxymethyl, methyl, hydroxyethyl, hydroxypropyl derivatives, proteins such as casein or caseinate, soya protein, gelatin, lignosulfonates, synthetic polymers such as poly (meth) acrylic acid, copolymers of (meth) acrylates with carboxyl-functional comonomer units, poly (meth) acrylamide, polyvinylsulfonic acids and their water-soluble copolymers; Melamine formaldehyde sulfonates, naphthalene formaldehyde sulfonates, styrene maleic acid and vinyl ether maleic acid copolymers. The proportion of colloids is preferably between 20 and 80% by weight, in particular between 50 and 60%. Preferably at least 2, 5 or 10 and at most 20, 50 or 80% colloids are included.

Preferred colloids are partially hydrolyzed or fully hydrolyzed polyvinyl alcohols having a degree of hydrolysis of from 80 to 100 mol%, in particular from 80 to 95 mol%, and a Höppler viscosity (in 4% strength aqueous solution) from 1 to

30mPas, preferably 3 to 15mPas (Höppler method at 20 ⁰ C, DIN 53015). Also preferred are partially hydrolyzed or fully hydrolyzed, hydrophobically modified polyvinyl alcohols having a degree of hydrolysis of 80 to 100 mol% and a Höppler viscosity in 4% aqueous solution of 1 to 30mPas, preferably 3 to 15 mPas. Examples of these are partially hydrolyzed copolymers of vinyl acetate with hydrophobic comonomers such as isopropenyl acetate, vinyl pivalate, vinyl ethyl hexanoate, vinyl esters of saturated alpha-branched monocarboxylic acids having 5 to 11 carbon atoms, dialkyl maleates and dialkyl fumarates such as diisopropyl maleate and diisopropyl fumarate, vinyl chloride, vinyl alkyl ethers such as nylbutyl ethers, alpha-olefins having 2 to 12 carbon atoms, such as ethene, propene and decene. The proportion of the hydrophobic units is preferably 0.1 to 10% by weight, based on the total weight of the partially or completely hydrolyzed polyvinyl alcohol. Particularly preferred are partially hydrolyzed or fully saponified copolymers of vinyl acetate with isopropenyl acetate having a degree of hydrolysis of 95 to 100 mol%. It is also possible to use mixtures of the stated polyvinyl alcohols.

Particularly preferred polymers are those which are redispersible in water. Suitable polymers are those based on one or more monomers from the group comprising vinyl esters of unbranched or branched alkylcarboxylic acids having 1 to 15 carbon atoms, methacrylic acid esters and acrylic acid esters of alcohols having 1 to 15 carbon atoms, vinylaromatics, olefins , Dienes and vinyl halides. Further suitable polymers are mentioned in WO2004 / 103928 on pages 8 to 10, to which reference is expressly made here.

Solids powder according to one of claims 1 to 6, characterized in that it contains at least one nonionic emulsifier having an HLB value of 5 to 20.

The invention also provides a process for producing a solid powder in which a core material containing at least one water-insoluble fatty acid resalz contains so contacted with at least one anionic, cationic or nonionic emulsifier as a shell material, that a solid powder comprising particles having an average particle size of 0.1 to 50 microns with predominantly core-shell structure is formed, wherein the core at least one water-insoluble fatty acid salt and the shell comprises at least one anionic, cationic or nonionic emulsifier and the solid powder when added to water or at least one polar organic solvent o- a mixture containing water and at least one polar organic solvent, having a temperature of 23 ° C under mechanical Force within 60 minutes or less forms a complete dispersion.

The shell material is preferably brought into contact with the core material in liquid form, for example, the core material can be brought into contact with the shell material by mixing or spraying.

Formulation Examples:

900 g of chalk (or other organic or inorganic carrier materials) are mixed with 100 g of calcium stearate and the whole is mixed in a high-shear mixer. Subsequently, this mixture is mixed with 20 g of emulsifier and mixed in with vigorous stirring. The product can be suspended in water with vigorous stirring.

900 g of chalk (or other organic or inorganic carrier materials) are mixed with 60 g of stearic acid and 8.66 g of calcium hydroxide and 10 g of water and the whole is stirred in a pressure reactor at 140 ° C until the direct reaction has taken place. Subsequently, this mixture is mixed with 100 g of sodium stearate and mixed in with vigorous stirring. The product can be suspended in water with vigorous stirring. 900 g of chalk (or other organic or inorganic carrier materials) are mixed with 91 g of stearic acid and 73 g of zinc acetate and 100 g of water and the whole is stirred in a pressure reactor at 140 ° C and then the water and acetic acid is removed in vacuo. This mixture is mixed with 50 g of triethanolammonium stearate and mixed in with vigorous stirring. The product can be suspended in water with vigorous stirring.

900 g of chalk (or other organic or inorganic carrier materials) are mixed with 100 g of sodium stearate with 45 g of zinc chloride and 100 g of water and the whole is stirred in a pressure reactor at 140 ° C and then the water is removed in vacuo. Subsequently, this mixture is mixed with 100 g of sodium stearate and mixed in with vigorous stirring. The product can be suspended in water with vigorous stirring.

900 g of chalk (or other organic or inorganic support materials) are mixed with 200 g of sodium stearate with 45 g of zinc acetate and 100 g of water and the whole is stirred in a pressure reactor at 140 ° C and then the water is removed in vacuo. The product can be suspended in water with vigorous stirring.

100 g of sodium stearate (or 10% emulsifier) are added to 900 g of calcium stearate and the mixture is mixed in a high-shear mixer. The product can be suspended in water with vigorous stirring.

900 g of calcium stearate (or metal soaps or metal soap mixtures) are mixed with 90 g of sodium laurate and 10 g of an emulsifier and the whole is mixed in a high-shear mixer. The product can be suspended in water with vigorous stirring.

900 g of calcium stearate (or metal soaps or metal soap mixtures) are mixed with 50 g of emulsifier and 10 g of a low molecular weight cosurfactant (eg polyol). sets and the whole is mixed in a high shear mixer. The product can be suspended in water with vigorous stirring.

900 g of aluminum oxide (or other organic or inorganic materials) are mixed with 10-100 g of stearic acid or zinc stearate and the whole is mixed in a high-shear mixer. Subsequently, this mixture is mixed with 20 g of emulsifier and mixed in with vigorous stirring. The product can be suspended in water with vigorous stirring.

700 g of calcium stearate are mixed with 300 g of sodium oleate and the whole is mixed in a high-shear mixer. Subsequently, this mixture is mixed with 20 g of emulsifier and mixed in with vigorous stirring. The product can be suspended in water with vigorous stirring.

700 g of zinc stearate are melted at 130 ^° C. and admixed with 300 g of sodium steate and the whole is stirred. Then grind the solidified melt and mixed with 20 g of emulsifier and mixed in with vigorous stirring. The product can be suspended in water with vigorous stirring.

900 g of calcium carbonate are ground with 10 g of calcium stearate and the whole is then transferred to a thermomixer. An aqueous solution (emulsifier or alkali / NH4 stearate) is sprayed onto this mixture and the water is evaporated with vigorous stirring. The product can be suspended in water with vigorous stirring.

900 g of stearic acid are mixed with 90 g of sodium hydroxide, 50 g of water and 80 g of emulsifier, and a cosurfactant. The whole is stirred at 140 ⁰ C and the water is removed. To this dried powder mixture 45 g of calcium acetate are added and mixed. The product can be suspended in hot water with vigorous stirring (dissolver disk) and the calcium stearate prepared in situ in double reaction has a high fineness. 900 g of a triglyceride (fats, oils, vegetarian, animal) is mixed with 120 g of calcium hydroxide and strong with 100 g of water in a pressure reactor at 160 ⁰ C mixed. After the lipid cleavage, the water is drawn off and an emulsifier or alkali / NH4 stearate added and processed under high shear in a mixer. The product can be suspended in water with vigorous stirring.

700 g of zinc stearate are melted at 130 ° C. and mixed with 300 g of paraffin and the whole is stirred under high shear until the paraffin is finely dispersed. Then grind the solidified melt and add 20 g of emulsifier and mix in with vigorous stirring. The product can be suspended in water with vigorous stirring.

700 g of paraffin are melted at 130 ° C and treated with 300 g of sodium oleate and the whole is stirred under high shear. Then grind the solidified melt and mixed with 20 g of emulsifier and mixed in with vigorous stirring. The product can be suspended in water with vigorous stirring.

900 g of calcium carbonate are ground with 30 g of stearic acid and 4 g of calcium hydroxide and the whole is then transferred to a thermal mixer. An aqueous solution (emulsifier or alkali / NH4 stearate) is sprayed onto this mixture and the water is evaporated with vigorous stirring. The product can be suspended in water with vigorous stirring.

900 g of calcium stearate are mixed with 100 g of a mixture (prepared according to the following instructions: 900 g of a triglyceride is mixed with 120 g of calcium hydroxide and strongly mixed with 100 g of water in a pressure reactor at 160 ^° C. After the lipid cleavage, the water is removed and sodium stearate is added strong shear processed in a mixer) and propane triol mixed. The product can be suspended in water with vigorous stirring.

900 g of a triglyceride (fats, oils, vegetarian, animal) are admixed with 50 g of calcium hydroxide and 40 g of sodium hydroxide and strongly mixed with 100 g of water in a pressure reactor at 160.degree. After lipolysis, the water is drawn off and an emulsifier is added and processed in a mixer with high shear. The product can be suspended in water with vigorous stirring.

700 g of a hardened fat and 100 g of a highly absorbent material (montmorillonite, bentonite, bleaching earth, zeolite, etc.) are melted at 130 ° C and treated with 100 g of sodium oleate and the whole is stirred under high shear. Then grind the solidified melt and mixed with 20 g of emulsifier and mixed in with vigorous stirring. The product can be suspended in water with vigorous stirring.

700 g of a paraffin and 100 g of a highly absorbent material (montmorillonite, bentonite, bleaching earth, zeolite, etc.) are melted at 130 ° C and treated with 100 g of sodium oleate and the whole is stirred under high shear. Then grind the solidified melt and mixed with 20 g of emulsifier and mixed in with vigorous stirring. The product can be suspended in water with vigorous stirring.

900 g of microcellulose <10 microns are mixed with 50 g of zinc stearate and the whole is mixed in a thermomixer at 130 ⁰ C. Subsequently, this mixture is mixed with 50 g of sodium stearate and mixed in with vigorous stirring. The product can be suspended in water with vigorous stirring.

Claims

December 15, 2008 Baerlocher GmbH BA70374PC FI / bg claims

A solid powder comprising particles having an average particle size of from 0.1 to 50 μm having a predominantly core-shell structure, wherein the core consists of a core material containing at least one water-insoluble fatty acid salt and the shell consists of a shell material containing at least one anionic, contains cationic or nonionic emulsifier and the solid powder when added to water or at least one polar organic solvent or a mixture containing water and at least one polar organic solvent, in a

Temperature of 23 ⁰ C under mechanical force within 60 minutes or less forms a complete dispersion.

2. Solids powder according to claim 1, characterized in that, the core is a fatty acid salt with a metal cation or an ammonium cation or a mixture of fatty acid salts of at least two different metal cations or two different ammonium cations or a mixture of at least one metal cation and at least one ammonium cation, wherein the Metal cations are selected from the group consisting of alkali metals, alkaline earth metals, zinc, aluminum and rare earths.

3. Solid powder according to one of the preceding claims, characterized in that the core material contains at least one organic or inorganic carrier material.

4. solid powder according to any one of the preceding claims, characterized in that the proportion of fatty acid salts of fatty acids with 8 to 18 C Atoms, based on the total amount of fatty acid salts in the shell material, 20 wt .-% or more than 20 wt .-% makes,.

5. Solids powder according to one of the preceding claims, characterized in that at least one fatty acid salt of one of the metals sodium,

Contains potassium, zinc, magnesium or calcium.

6. solid powder according to any one of the preceding claims, characterized in that it contains in the shell an anionic or a nonionic see emulsifier.

7. Solid powder according to one of the preceding claims, characterized in that it contains at least one additive selected from solvents, binders, polymers, colloids, surfactants, emulsifiers or solvents, or a mixture of two or more thereof.

8. Solids powder according to one of the preceding claims, characterized in that it contains at least one nonionic emulsifier having an HLB value of 5 to 20.

A process for producing a solid powder according to any one of the preceding claims, wherein a core material containing at least one water-insoluble fatty acid salt so contacted with at least one anionic, cationic or nonionic emulsifier as shell material is a solid powder comprising particles having an average particle size from 0.1 to 50 microns with a predominantly core-shell structure is formed, wherein the core comprises at least one water-insoluble fatty acid salt and the shell at least one anionic, cationic or nonionic emulsifier and the solid powder when added to water or at least one polar organic solvent or a mixture containing water and at least one polar organism a good solvent, with a temperature of 23 ⁰ C under mechanical force within 60 minutes or less forms a complete dispersion.

10. The method according to claim 9, characterized in that the shell material is brought into liquid form in contact with the core material.

11. The method according to claim 9 or 10, characterized in that the core material is brought into contact with the shell material by mixing or spraying.