Stabilizer concentrate for wax dispersions

Abstract

The present invention relates to a stabilizer concentrate that improves the stability of monoethylene glycol and / or diethylene glycol monoester and / or diester wax dispersions in personal care compositions, the stabilizer concentrate comprising hydrogenated castor oil and betaine and being free of anionic surfactants.

Description

[Technical field]

[0001] The present invention relates to a stabilizer concentrate capable of improving the stability of wax dispersions of mono- and / or diesters of monoethylene glycol and / or diethylene glycol, said stabilizer concentrate comprising hydrogenated castor oil and betaine and free of anionic surfactants; further, the present invention relates to the use of such concentrates and methods for their preparation, as well as personal care compositions comprising them and methods for preparing personal care compositions. [Background technology]

[0002] prior art The use of wax dispersions based on alkylene glycol fatty acid esters has been established for many years and is a known technique for providing personal care products with attractive, rich, and interesting appearance. Depending on the desired appearance properties, the wax dispersions can be modified to produce pearlized properties with high brightness and / or opalescent properties with high whiteness. For the intended use in personal care compositions, the wax dispersions must have high compatibility with other auxiliaries and good physical stability, and are expected to be especially storage stable. Furthermore, manufacturers of personal care compositions want to have waxes that are easy to add during the process without time-consuming and energy-consuming manufacturing steps such as melting.

[0003] A preferred method is the use of wax in the form of a premixed wax dispersion. European Patents EP 0581193 B1 and EP 0568848 B1 disclose flowable concentrated pearling formulations containing large amounts of fatty acid glycol esters, betaines as zwitterionic surfactants, and fatty alcohol alkoxylates as nonionic surfactants. International Patent Application WO 96 / 21711 also describes pearling concentrates containing nonionic surfactants, zwitterionic surfactants, and anionic surfactants.

[0004] WO 2003 / 033634 A1 describes fluid, highly concentrated opacifier preparations based on fatty acid glycol esters, amphoteric surfactants and fatty acid partial glycerides.

[0005] Unfortunately, the use of wax dispersions in personal care products can result in product separation, which is very aesthetically unattractive, at least to consumers.To improve the stability of personal care compositions that contain wax dispersions, EP 2037877 B1 discloses the use of hydrogenated castor oil.However, hydrogenated castor oil needs to be heated in an additional manufacturing step, which is slow and expensive.

[0006] EP 3324927 describes aqueous dispersions of hydrogenated castor oil, which are used together with surfactant mixtures consisting of anionic surfactants, amphoteric surfactants and nonionic surfactants to stabilize cosmetic compositions such as shampoos or shower gels.Dispersions can be added at room temperature, i.e. no further preparation steps are required.Nevertheless, these hydrogenated castor oil dispersions have high viscosity and are not fluid, therefore requiring long stirring times at high stirring speeds to homogenize.

[0007] WO 2016 / 064847 describes a personal care composition comprising a hydrogenated castor oil premix composition comprising crystals derived from hydrogenated castor oil formed by combining hydrogenated castor oil with a surfactant and water under high shear and heating the whole to 65-84°C. However, according to all examples, this premix composition requires the presence of an anionic surfactant and exhibits high viscosity. Moreover, the preparation of such dispersions is highly sensitive to temperature changes, and temperatures above 84°C do not produce the desired results. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] EP 0581193 B1 [Patent Document 2] EP 0568848 B1 [Patent Document 3] WO 96 / 21711 [Patent Document 4] WO 2003 / 033634 A1 [Patent Document 5] EP 2037877 B1 [Patent Document 6] EP 3324927 [Patent Document 7] WO 2016 / 064847 Summary of the Invention

[0009] Therefore, there is a need for further stabilizers (concentrates) that are fluid and low in viscosity, have a high stabilizing effect and a high content of active ingredients. Furthermore, the stabilizer should improve the stability of wax dispersions that are part of personal care compositions as pearlizing and / or opacifying agents. Furthermore, the stabilizer concentrate should be able to exhibit stabilizing properties in a wide range of personal care compositions, especially in conditioning compositions that are difficult to stabilize due to the presence of deposition agents in the presence of cationic polymers. Furthermore, there is a need for stabilizers that can be blended in an easy and cost-effective manner without any effort, especially at room temperature (via "cold processing").

[0010] Description of the Invention The present invention relates to a concentrate for stabilizing a wax dispersion comprising a wax selected from the group consisting of monoesters and / or diesters of monoethylene glycol and / or diethylene glycol esters, said concentrate comprising: (a) hydrogenated castor oil, (b) a surfactant selected from the group consisting of betaines; (c) an optional non-ionic emulsifier; (d) optional other auxiliary substances or additives (including salts); and (e) water provided that the concentrate does not contain an anionic surfactant, the sum of the amounts (a)-(d) is in the range of 30%-80% by weight, and the sum of the amounts (a)-(d) is 100% by weight with water; Regarding the concentrate.

[0011] The present invention further relates to a method for producing the concentrate according to claim 1, characterized in that said concentrate is prepared by mixing together components (a), (b) and optionally (c) and / or (d), adding the required amount of water, heating the mixture to about 85°C-90°C and cooling with stirring.

[0012] Furthermore, the present invention relates to the use of the concentrate according to claim 1 as a stabiliser for wax dispersions comprising waxes selected from the group consisting of mono- and / or diesters of monoethylene glycol and / or diethylene glycol.

[0013] The present invention further provides a personal care composition comprising: A) a concentrate according to claim 1; B) a wax dispersion comprising a wax selected from the group consisting of monoesters and / or diesters of monoethylene glycol and / or diethylene glycol; C) one or more cleansing surfactants selected from the group consisting of anionic surfactants, amphoteric surfactants or zwitterionic surfactants; D) an optional cationic polymer; and E) Optionally one or more other ingredients different from C) and / or D). and

[0014] Finally, the present invention relates to a process for the preparation of a personal care composition according to the claims, characterized in that one or more surfactants C) and a wax dispersion B) and an optional cationic polymer D) are mixed at room temperature, a concentrate A) according to at least one of claims 1 to 10 is added and stirred together, optionally further ingredients E) can be added before or after the addition of the concentrate A).

[0015] Surprisingly, it has been found that the avoidance of anionic surfactants in the wax dispersion results in a flowable concentrate with a high active substance content.Moreover, the concentrate according to the invention is very stable in itself and very well improves the stability of wax dispersions containing fatty acid esters of monoethylene glycol and / or diethylene glycol.

[0016] In particular, wax dispersions used as opacifiers in personal care compositions can have their storage stability improved, i.e., no visible change in white color and no separation of the personal care product during storage is observed. Surprisingly, the above effect is observed even in the presence of cationic polymers. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] According to the invention, a "concentrate" is a composition having a reduced water content compared to a typical dispersion, which according to the invention preferably amounts to 20 to 70% by weight in total relative to the concentrate.

[0018] The abbreviation "weight % (wt%)" means "percent by weight" and is synonymous with "% by weight."

[0019] According to the invention, a "wax" is a compound having a melting point above 25° C., preferably above 50° C. and especially above 80° C. The melting point was determined according to ISO 6321.

[0020] According to the present invention, the term "free of anionic surfactants" means that anionic surfactants are not intentionally added as ingredients for preparing the concentrate, so that in theory the concentrate has 0% by weight of anionic surfactants, and in fact the ingredients of the concentrate may contain by-products, which may be anionic surfactants. However, these potential by-products are not intentionally added, so that the concentrate according to the present invention does not contain anionic surfactants.

[0021] According to the present invention, the term "stabilizer for wax dispersions" means that the concentrate stabilizes the wax in dispersion, preferably in water, which is part of the personal care composition. The stabilizing effect was measured as storage stability, i.e. appearance of the wax dispersion or personal care composition. The concentrate should remain unchanged at 40°C for at least 4 weeks.

[0022] concentrate The concentrate according to the invention comprises a) Hydrogenated castor oil (HCO) Includes.

[0023] Castor oil (CAS-No. 8001-79-4) is a vegetable oil that contains glycerides, especially triglycerides, of fatty acids with C10-C22 alkyl or alkenyl moieties containing hydroxyl groups. Hydrogenation of castor oil produces hydrogenated castor oil by converting the double bonds present in the starting oil as ricinoleyl moieties. These moieties are converted to saturated hydroxyalkyl moieties, such as ricinoleyl moieties, e.g. hydroxystearyl.

[0024] The hydrogenated castor oil (HCO) may be processed in any suitable starting form, for example, but not limited to, a form selected from solid, molten and mixtures thereof. Useful hydrogenated castor oil (HCO) may have the following characteristics: more than 80% by weight, in particular 80-90% by weight, of triglycerides of ricinoleic acid. The residue may be free fatty acids, water and other impurities.

[0025] Preferred is hydrogenated castor oil (HCO) having a melting point of about 40° C. to about 100° C., alternatively about 65° C. to about 95° C., and / or an iodine value range of about 0 to about 5, alternatively about 0 to about 4, and alternatively about 0 to about 2.6. The melting point of hydrogenated castor oil (HCO) can be measured using DSC (Differential Scanning Calorimetry).

[0026] Suitable hydrogenated castor oils (HCO) include commercially available hydrogenated castor oils. Non-limiting examples of commercially available hydrogenated castor oils (HCO) suitable for use include: THIXCIN-R (supplied by Elementis) and Cutina® HR (supplied by BASF Personal Care and Nutrition GmbH), both of which are supplied as powders.

[0027] A preferred concentrate comprises (a) hydrogenated castor oil in an amount ranging from 0.01 to 7% by weight of the concentrate.

[0028] b) Betaine Surfactants Betaines are known surfactants that are primarily produced by carboxyalkylation, preferably carboxymethylation, of amine-based compounds. The starting material is preferably condensed with a halocarboxylic acid or its salt, more specifically with sodium chloroacetate. Examples of suitable betaines are represented by the formula (I):

[0029] [ka] and R 1 represents an alkyl and / or alkenyl group containing 6 to 22 carbon atoms, R 2 represents hydrogen or an alkyl group containing 1 to 4 carbon atoms; R 3represents an alkyl group containing 1 to 4 carbon atoms, n is a number from 1 to 6, and X is an alkali metal and / or alkaline earth metal or ammonium. Typical examples are hexylmethylamine, hexyldimethylamine, octyldimethylamine, decyldimethylamine, dodecylmethylamine, dodecyldimethylamine, dodecylethylmethylamine, C 12 / 14 Cocoalkyl dimethylamine, myristyl dimethylamine, cetyl dimethylamine, stearyl dimethylamine, stearyl ethyl methylamine, oleyl dimethylamine, C 16 / 18 Carboxymethylation products of tallow alkyldimethylamines, and technical mixtures thereof.

[0030] Other suitable betaines have the formula (II):

[0031] [ka] where R 6 CO is a fatty acyl group containing 6 to 22 carbon atoms and 0 or 1 to 3 double bonds, m is a number from 1 to 3, and R 4 is hydrogen or C 1-4 represents an alkyl group, R 5 is C 1-4where n is a number between 1 and 6, and X is an alkali metal and / or alkaline earth metal or ammonium. Typical examples are the reaction products of fatty acids containing 6 to 22 carbon atoms, namely caproic acid, caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, palmitoleic acid, stearic acid, isostearic acid, oleic acid, elaidic acid, petroselinic acid, linoleic acid, linolenic acid, eleostearic acid, arachic acid, gadoleic acid, behenic acid and erucic acid, and technical mixtures thereof, with N,N-dimethylaminoethylamine, N,N-dimethylaminopropylamine, N,N-diethylaminoethylamine and N,N-diethylaminopropylamine, condensed with sodium chloroacetate. C, known under the CTFA name of cocamidopropyl betaine, 8 / 18 It is preferred to use the condensation products of coco fatty acid-N,N-dimethylaminopropylamide with sodium chloroacetate. Particularly preferred are betaines that are distinguished by their high purity; in other words, low-salt betaines are used that have a maximum salt content of 13% by weight, preferably 11% by weight and more particularly 7% by weight, based on the active substance. The corresponding salt is determined by the formation of amphoteric surfactants; in the most common example, this is sodium chloride. In a particularly preferred embodiment, these betaines also have a low content of free fatty acids, up to 4% by weight, preferably up to 3% by weight, based on the active substance.

[0032] Suitable cocamidopropyl betaines include commercially available cocamidopropyl betaines such as Dehyton® PK 45 (supplied by BASF Personal Care and Nutrition GmbH).

[0033] A preferred concentrate comprises (b) a surfactant selected from the group consisting of betaines in an amount ranging from 10 to 45% by weight of the concentrate.

[0034] In a preferred embodiment, the quantitative ratio of betaine (b) to hydrogenated castor oil (a) is within the range of 2:1 to 15:1.

[0035] c) Optional non-ionic emulsifier According to the invention, the concentrate may contain a non-ionic emulsifier. In the context of the present invention, the terms "non-ionic surfactant" or "non-ionic emulsifier" are used synonymously and are also understood to mean a mixture of two or more kinds.

[0036] Examples for non-ionic emulsifiers are fatty alcohol polyglycol ethers, alkylphenol polyglycol ethers, fatty acid polyglycol esters, fatty acid amide polyglycol ethers, fatty amine polyglycol ethers, optionally alkoxylated polyol fatty acid esters, in particular ethoxylated fatty acid glycerol esters, alkoxylated triglycerides, mixed ethers or mixed formals, optionally partially oxidized alk(en)yl polyglycosides or glucuronic acid derivatives, fatty acid N-alkylglucamides, protein hydrolysates (in particular wheat-based vegetable products), polysorbates and amine oxides.

[0037] When the non-ionic emulsifiers contain polyglycol ether chains, these may have a conventional homolog distribution, but preferably have a narrow homolog distribution.

[0038] Preferred examples of the optionally alkoxylated polyol fatty acid esters may be selected from the following group of compounds, with the proviso that (c) is different from (a): - partial esters of glycerol and / or sorbitan with unsaturated linear or saturated linear or branched fatty acids containing 6 to 22 carbon atoms and / or hydroxycarboxylic acids containing 3 to 18 carbon atoms, and their adducts with 1 to 30 mol of ethylene oxide; - partial esters of polyglycerol (average degree of self-condensation 2-8), polyethylene glycol (molecular weight 400-5,000), trimethylolpropane, pentaerythritol, sugar alcohols (for example sorbitol) with saturated and / or unsaturated, linear or branched fatty acids containing 6 to 22 carbon atoms and / or hydroxycarboxylic acids containing 3 to 18 carbon atoms, and their adducts with 1 to 30 mol of ethylene oxide; mixed esters of pentaerythritol, fatty acids, citric acid and fatty alcohols and / or mixed esters of fatty acids containing from 6 to 22 carbon atoms, methylglucose and a polyol, preferably glycerol or polyglycerol.

[0039] Typical examples of suitable partial glycerides are the following, which are different from (a): hydroxystearic acid monoglyceride, hydroxystearic acid diglyceride, isostearic acid monoglyceride, isostearic acid diglyceride, oleic acid monoglyceride, oleic acid diglyceride, ricinoleic acid monoglyceride, ricinoleic acid diglyceride, linoleic acid monoglyceride, linoleic acid diglyceride, linolenic acid monoglyceride, linolenic acid diglyceride, erucic acid monoglyceride, erucic acid diglyceride, tartaric acid monoglyceride, tartaric acid diglyceride, citric acid monoglyceride, citric acid diglyceride, malic acid monoglyceride, malic acid diglyceride, and technical mixtures thereof, which may still contain small amounts of triglycerides resulting from the production process. Also suitable are addition products of 1 to 30 mol and preferably 5 to 10 mol of ethylene oxide with the abovementioned partial glycerides.

[0040] Suitable sorbitan esters include sorbitan monoisostearate, sorbitan sesquiisostearate, sorbitan diisostearate, sorbitan triisostearate, sorbitan monooleate, sorbitan sesquioleate, sorbitan dioleate, sorbitan trioleate, sorbitan monoerucate, sorbitan sesquierucate, sorbitan dierucate, sorbitan trierucate, sorbitan monoricinoleate, sorbitan sesquierucate, sorbitan diricinoleate, sorbitan tri ... Suitable sorbitan esters include sorbitan monohydroxystearate, sorbitan sesquihydroxystearate, sorbitan dihydroxystearate, sorbitan trihydroxystearate, sorbitan monotartrate, sorbitan sesquitartrate, sorbitan ditartrate, sorbitan tritartrate, sorbitan monocitrate, sorbitan sesquicitrate, sorbitan dicitrate, sorbitan tricitrate, sorbitan monomaleate, sorbitan sesquimaleate, sorbitan dimaleate, sorbitan trimaleate and technical mixtures thereof. Also suitable are addition products of 1 to 30 mol and preferably 5 to 10 mol of ethylene oxide onto the abovementioned sorbitan esters.

[0041] Typical examples of suitable polyglycerol esters are Polyglyceryl-2 Dipolyhydroxystearate (Dehymuls® PGPH), Polyglycerin-3-Diisostearate (Lameform® TGI), Polyglyceryl-4 Isostearate (Isolan® GI 34), Polyglyceryl-3 Oleate, Diisostearoyl Polyglyceryl-3 Diisostearate (Isolan® PDI), Polyglyceryl-3 Methylglucose Distearate (Tego Care® 450), Polyglyceryl-3 Beeswax (Cera Bellina®), Polyglyceryl-4 Caprate (Polyglycerol Caprate T2010 / 90), Polyglyceryl-3 Cetyl Ether (Chimexane® NL), Polyglyceryl-3 Distearate (Cremophor® GS 32), and Polyglyceryl Polyricinoleate (Admul® WOL 1403), Polyglyceryl Dimerate Isostearate, and mixtures thereof.

[0042] Other examples of suitable polyol esters are the mono-, di- and triesters of lauric acid, coco fatty acid, tallow fatty acid, palmitic acid, stearic acid, oleic acid, behenic acid, etc., optionally reacted with trimethylolpropane or pentaerythritol and 1 to 30 moles of ethylene oxide.

[0043] Among the optionally alkoxylated fatty acid glycerol esters, preferred nonionic emulsifiers are the partial esters of ethoxylated glycerol, in particular those with a monoester content of more than 40% by weight in a mixture of mono-, di- and triesters.Suitable is the commercial product Cetiol® HE, available from BASF Personal Care Nutrition GmbH.

[0044] Additionally, alkyl polyglycosides are preferred nonionic emulsifiers, in particular those having the formula (III): R 7 O-[G] p (III) (In the formula, - R 7 is an alkyl group having 6 to 22 carbon atoms, - G is a sugar group having 5 or 6 carbon atoms, - p is a number from 1 to 10) It is a known nonionic surfactant having the formula:

[0045] They can be obtained by the relevant methods of preparative organic chemistry. The alkyl polyglycosides can be derived from aldoses or ketoses having 5 or 6 carbon atoms, preferably from glucose. The preferred alkyl polyglycosides are therefore alkyl polyglucosides. The index p in the general formula (III) specifies the degree of polymerization (DP), i.e. the distribution of monoglycosides and polyglycosides, and is a number between 1 and 10. p in a given compound must always be an integer, and here we may assume in particular values ​​p=1 to 6, although the value p for a particular alkyl polyglycoside is a calculated parameter that is analytically determined and is most often a fraction. Preferably, alkyl polyglycosides with an average degree of polymerization p between 1.1 and 30 are used. From the point of view of technical application, preference is given to alkyl polyglycosides whose degree of polymerization is less than 1.7, in particular between 1.2 and 1.7.

[0046] Alkyl group R 7can be derived from primary alcohols having 6 to 22, preferably 6 to 18, carbon atoms. Typical examples are caproic alcohol, caprylic alcohol, capric alcohol, decyl alcohol and undecyl alcohol, and also technical grade mixtures thereof, as obtained, for example, in the hydrogenation of technical grade fatty acid methyl esters or during the hydrogenation of aldehydes derived from the oxo synthesis of Laurent. The alkyl group R 7 can also be derived from lauryl alcohol, myristyl alcohol, cetyl alcohol, palmoleyl alcohol, stearyl alcohol, isostearyl alcohol, oleyl alcohol, elaidyl alcohol, petroselinyl alcohol, arachyl alcohol, gadoleyl alcohol, behenyl alcohol, erucyl alcohol, brassidyl alcohol, and technical grade mixtures thereof.

[0047] In the context of the present invention, preference is given in particular to mixtures of different alkyl polyglycosides of formula (III) in which R 7 is derived from a mixture of primary alcohols. According to one preferred embodiment, R 7 is derived from a mixture of primary alcohols containing 10-50% by weight of 8-10 carbon atoms and 50-90% by weight of 12-16 carbon atoms.

[0048] According to another preferred embodiment, R 7 is derived from a mixture of primary alcohols containing 75-95% by weight of primary higher alcohols having 10-22 carbon atoms, in particular from a mixture of fatty acids obtained from coconut, preferably having 12-16 carbon atoms.

[0049] Suitable products are Plantacare® 2000 and Plantacare® 818, both available from BASF Personal Care Nutrition GmbH.

[0050] Preferably, the concentrate comprises a non-ionic emulsifier (c) selected from the group consisting of partial esters of glycerol with saturated and / or unsaturated, linear fatty acids containing from 6 to 22 carbon atoms and their adducts with 1 to 30 mol of ethylene oxide, and alkyl polyglucosides with saturated and / or unsaturated, linear or branched fatty acids containing from 6 to 22 carbon atoms.

[0051] Preferably, the concentrate comprises a non-ionic emulsifier (c) in an amount ranging from 0 to 30% by weight, preferably from 5.0 to 30% by weight, relative to the concentrate.

[0052] Optional other auxiliary substances or additives (including salts) d) According to the invention, the concentrate may contain d) other auxiliaries or additives, including salts.

[0053] Depending on the preparation of the betaine surfactant (b), salts may be included as by-products; in the most common example, the salt is sodium chloride. Additionally, low contents of free fatty acids may also be possible by-products.

[0054] Examples of other auxiliaries are thickeners, complexing agents, non-aqueous solvents, preservatives and / or pH adjusters. It is preferred not to add auxiliaries, although their addition is still possible.

[0055] Preferred concentrates contain other auxiliaries or additives (including salts) (d) in the range of 0.1-15% by weight based on the concentrate material.

[0056] According to one preferred embodiment, the concentrate comprises: (a) 0.5 to 7.0% by weight of hydrogenated castor oil; (b) 30.0 to 40.0% by weight of a surfactant selected from the group consisting of betaines; (d) 5.0 to 10.0% by weight of other auxiliaries or additives (including salts), and (e) Water, in an amount totalling 100% by weight It consists of:

[0057] According to another preferred embodiment, the concentrate comprises (a) 0.5 to 7.0% by weight of hydrogenated castor oil; (b) 10 to 35.0% by weight of a surfactant selected from the group consisting of betaines; (c) 5.0 to 30.0 weight percent of a nonionic emulsifier; (d) 2.0 to 10.0% by weight of other auxiliaries or additives (including salts), and (e) Water, in an amount totalling 100% by weight It consists of:

[0058] According to the invention, the concentrate is flowable and has a viscosity in the range of 8,000 to 25,000 mPas, in particular 9,000 to 20,000 mPas (Brookfield, RVT; spindle 4; 10 rpm; 23).

[0059] According to the invention, the concentrate can be obtained by the following method: the concentrate is prepared by mixing together components (a), (b) and optionally (c) and / or optionally (d), adding the required amount of water, heating the mixture to about 85°C-90°C, and then cooling with stirring. It is preferred to heat the mixture to about 88-93°C.

[0060] The reaction mixture is preferably cooled with agitation, for example stirring, in particular for at least 5 to 150 minutes, preferably at 50 to 150 rpm. In the sense of the present invention, it is desirable to avoid crystallization or recrystallization of the hydrogenated castor oil (a) during the process. For cooling, a cooling rate of 15 to 30° C. per hour during the process is preferred.

[0061] According to the invention the concentrate is used as a stabiliser for wax dispersions comprising waxes selected from the group consisting of mono- and / or diesters of monoethylene glycol and / or diethylene glycol.

[0062] Stabilized Wax Dispersions According to the invention, all wax dispersions comprise one or more waxes selected from the group consisting of mono- and / or diesters of monoethylene glycol and / or diethylene glycol.

[0063] According to the present invention, the term "mono- and / or diesters of monoethylene glycol and / or diethylene glycol" means monoesters of monoethylene glycol, monoesters of diethylene glycol and diesters of diethylene glycol, as well as mixtures thereof.

[0064] The following formula describes a suitable ester of ethylene glycol: R 8 CO(OA) q OR 9 (IV) In the formula, R 8 CO is a linear or branched, saturated or unsaturated acyl group containing 6 to 22 carbon atoms; R 9 is hydrogen or R 8 It has the same meaning as CO, A is a linear alkylene radical containing 2 carbon atoms and q is the number 2, provided that they are waxes at room temperature. Typical examples are the monoesters of monoethylene glycol and the mono- and / or diethylene glycol (q=2) with fatty acids containing 16 to 22, preferably 16 to 18, carbon atoms, such as palmitic acid, palmitoleic acid, stearic acid, isostearic acid, oleic acid, elaidic acid, petroselinic acid, linoleic acid, linolenic acid, eleostearic acid, arachic acid, gadoleic acid, behenic acid and erucic acid, and technical mixtures thereof.

[0065] Preferred are the mono- and / or diesters of diethylene glycol, especially with fatty acids having from 6 to 22 carbon atoms.

[0066] According to one embodiment of the present invention, the stabilized wax dispersion comprises 16 ~C 18 Mixtures of fatty acids, preferably mono- and / or diesters of diethylene glycol with stearic acid, palmitic acid and mixtures thereof, are particularly preferred, in which the ratio of palmitic acid to stearic acid in the mixture is preferably 45:55 to 1:99, more preferably 40:60 to 1:99, more preferably still 30:70 to 1:99, more preferably still 30:70 to 2:98.

[0067] According to a second embodiment of the invention, the stabilized wax dispersion comprises mono- and / or diesters of diethylene glycol with a fatty acid mixture comprising 85-100% by weight of stearic acid and 0-15% by weight of different fatty acids having 12-22 carbon atoms, relative to the total amount of fatty acids. Said fatty acid mixture preferably comprises 90-98% by weight of stearic acid and 2-10% by weight of other saturated fatty acids having 16-22 carbon atoms, relative to the total amount of fatty acids, in particular said fatty acid mixture consists of 90-96% by weight of stearic acid and 4-10% by weight of other saturated fatty acids having 16-22 carbon atoms. Other saturated fatty acids having 16-22 carbon atoms are palmitic acid, arachidic acid and behenic acid.

[0068] Preferably, the stabilized wax dispersion comprises a diethylene glycol fatty acid ester, in particular a diethylene glycol di-fatty acid ester, which for technical reasons comprises 90 to 100% by weight of a diethylene glycol di-acid ester and 0 to 10% by weight of a diethylene glycol mono-fatty acid ester.

[0069] In a very particularly preferred embodiment, the concentrate according to the invention stabilizes a wax dispersion, in which the wax is a diester of diethylene glycol fatty acid ester having a diethylene glycol difatty acid content of 90 to 100% by weight and a content of 90 to 98% by weight of stearic acid and 2 to 10% by weight of other saturated fatty acids having 16 to 22 carbon atoms in the fatty acid mixture.

[0070] Such a product is commercially available under the trade name Cutina® KE 2747 (BASF).

[0071] According to a particular preferred embodiment, the wax in the dispersion has an average particle size in the range of 0.8 to 3.5 μm, in particular in the range of 1.0 to 3.0 μm, with the particle size distribution preferably showing more than 50% being less than 3 μm and 90% of all particles being less than 7 μm. In particular, the wax particles have a predominantly spherical particle shape, in particular 70% of all particles having a three-dimensional structure characterized in particular by a height:width:length ratio of 1:1:1. Such particle shape and particle amount can be determined by laser diffraction using a Mastersizer® 2000 device and the corresponding production description of MALVERN INSTRUMENTS GmbH, Marie-Curie-Strasse 4 / 1, 71083 Herrenberg, Germany.

[0072] Preferably, the wax dispersion comprises the wax in an amount of 20 to 35% by weight, preferably 25 to 30% by weight, based on the wax dispersion.

[0073] Preferably, the wax dispersion comprises a nonionic surfactant as a further component. Suitable are the nonionic surfactants already described as components of the concentrates according to the invention or as components of the personal care compositions. Preferred nonionic surfactants are fatty acid partial glycerides. In this context, fatty acid partial glycerides means monoglycerides, diglycerides and technical mixtures thereof, which may still contain small amounts of glycerol and triglycerides resulting from the manufacturing process. Preferred fatty acid partial glycerides are technical mixtures of fatty acid partial glycerides with a monoglyceride content in the range of 50-95% by weight, preferably 60-90% by weight, hereinafter also called glycerol mono-fatty acid esters.

[0074] Preferred fatty acid partial glycerides are selected from the group formed by glycerol mono-fatty acid esters with lauric acid, isotridecanoic acid, myristic acid, palmitic acid, palmoleic acid, stearic acid, isostearic acid, oleic acid, elaidic acid, petroselinic acid, linoleic acid, linolenic acid, eleostearic acid, arachnic acid, gadoleic acid, behenic acid and erucic acid and technical mixtures thereof. Particularly preferred are mono-fatty acid esters of (technical) glycerol with fatty acid mixtures containing fatty acids having 12 to 18 C atoms, preferably 90 to 100% by weight of oleic acid relative to the fatty acid mixture.

[0075] A suitable commercially available industrial product is, for example, Monomuls® 90-O 18, a retail product from BASF Personal Care & Nutrition GmbH.

[0076] The nonionic surfactant, particularly the fatty acid partial glyceride, is preferably contained in an amount of 0.5 to 3.0% by weight, more preferably 1.0 to 2% by weight, based on the wax dispersion.

[0077] The wax dispersion may further comprise an anionic surfactant selected from the group consisting of fatty alcohol (ether) sulfates.

[0078] In particular, the general formula (V): R'O(CH2CH2O) 0-10 SO3Y (V) where R' is a linear or branched alkyl and / or alkenyl group having 6 to 22 carbon atoms, and Y is an alkali metal and / or alkaline earth metal, ammonium, alkylammonium, alkanolammonium or glucanmonium. If the above numbers are zero (=0), this is a fatty alcohol sulfate. Fatty alcohol ether sulfates (numbers 1 to 10) are preferred. Typical examples are the investment product sulfates of caproic alcohol, capryl alcohol, 2-ethylhexyl alcohol, capri alcohol, lauryl alcohol, isotridecyl alcohol, myristyl alcohol, cetyl alcohol, palm oleyl alcohol, stearyl alcohol, isostearyl alcohol, oleyl alcohol, elaidyl alcohol, petroselinyl alcohol, arachyl alcohol, gadoleyl alcohol, behenyl alcohol, erucyl alcohol and brassylic alcohol and technical mixtures thereof in the form of their sodium and / or magnesium salts, with an average of 1 to 10 mol, in particular 2 to 5 mol, of ethylene oxide. The fatty alcohol (ether) sulfates can have both conventional and narrowed homolog distributions. The technical C lauryl ether sulfates, preferably in the form of their sodium and / or magnesium salts, with an average of 1 to 6 mol, preferably 1 to 3 mol, of ethylene oxide, are preferred. 12 / 14 , or C 12 / 18 It is particularly preferred to use fatty alcohol ether sulfates which are based on adducts with coconut fatty alcohol fractions.

[0079] A suitable commercially available industrial product is, for example, Texapon® N70, a retail product from BASF Personal Care & Nutrition GmbH.

[0080] A preferred wax dispersion comprises an anionic surfactant, especially a lauryl ether sulfate having an average degree of ethoxylation of 1 or 2, preferably in an amount of 8 to 15% by weight, preferably 9 to 12% by weight, based on the wax dispersion.

[0081] Furthermore, the wax dispersion may comprise the betaine surfactants already described as component b) of the concentrates according to the invention, preferably according to formula (I) and / or (II), in particular according to formula (II), of this group the C 2 O 4 , known under the CTFA name Cocamidopropyl Betaine, 8 / 18 It is preferred to use the condensation product of coconut fatty acid-N,N-dimethylaminopropylamide with sodium chloroacetate.

[0082] Preferred wax dispersions contain a betaine surfactant, especially cocamidopropyl betaine, preferably in an amount of 0-5% by weight, preferably 0.5-2.5% by weight, based on the wax dispersion.

[0083] It may be possible for the dispersion to comprise further auxiliaries or additives (including salts), for example as described as component d) in the concentrates, preferably in an amount of 0 to 10% by weight.

[0084] Finally, the wax dispersion may contain up to 100% water by weight.

[0085] According to the present invention, the concentrate comprises, in weight percent based on the wax dispersion, 20 to 35% by weight, preferably 25 to 30% by weight, of a wax selected from the group consisting of monoesters and / or diesters of monoethylene glycol and / or diethylene glycol, 0.5 to 3.0% by weight, preferably 1.0 to 2% by weight, of a nonionic surfactant; 8.0 to 15.0% by weight, preferably 9.0 to 12.0% by weight, of an anionic surfactant; 0 to 5.0% by weight, preferably 0.5 to 2.5% by weight, of a betaine surfactant, and 0-10% by weight of auxiliaries or additives (including salts), and Up to 100% water by weight It is preferred that the compound is used as a stabilizer for wax dispersions containing

[0086] In particular: waxes selected from diesters of diethylene glycol fatty acid esters, with a diethylene glycol difatty acid content of 90-100% by weight and a content of stearic acid of 90-98% by weight and other saturated fatty acids having 16-22 carbon atoms of 2-10% by weight in the fatty acid mixture, 0.5 to 3.0% by weight, preferably 1.0 to 2% by weight, of fatty acid partial glycerides; 8.0 to 15.0% by weight, preferably 9.0 to 12.0% by weight, of lauryl ether sulfate having an average degree of ethoxylation of 1 or 2, 0 to 5.0% by weight, preferably 0.5 to 2.5% by weight, of cocamidopropyl betaine, and 0-10% by weight of auxiliaries or additives (including salts), and Up to 100% water by weight It is preferred that the composition be used as a stabilizer for wax dispersions consisting of

[0087] According to the present invention, the concentrate preferably stabilizes the above wax dispersions included in personal care compositions as pearlizing and / or opacifying agents, especially in personal care compositions containing cationic polymers.

[0088] Personal Care Compositions Personal care compositions are understood here as all compositions known to those skilled in the art that are intended exclusively or primarily for external application to the human body or hair in order to cleanse, care for, protect, keep in good condition, impart fragrance, change or affect the appearance.Preferably, the concentrates are used to stabilize the defined wax dispersions in liquid personal care compositions, in particular surface-active personal care compositions such as foam baths, shower gels, shower baths, shower milks, shower creams, shampoos, hair masks, hair milks and hair conditioners.

[0089] The personal care composition according to the present invention comprises A) the concentrates described above and claimed in the claims, B) a wax dispersion comprising a wax selected from the group consisting of mono- and / or diesters of monoethylene glycol and / or diethylene glycol, as already described; C) one or more cleansing surfactants selected from the group consisting of anionic surfactants and betaine surfactants; D) an optional cationic polymer, and E) Optionally, other ingredient(s) different from C) and / or D). Includes.

[0090] Preferably, the personal care composition comprises, based on weight percent of the personal care composition: A) 0.5% to 10.0% by weight, in particular 1.5% to 7% by weight, of at least the concentrate according to claim 1 , B) 0.1% to 5% by weight, in particular 0.5% to 2.5% by weight, of the wax dispersions already described, C) 1.0 to 30% by weight, in particular 5.0 to 25.0% by weight, of an anionic, amphoteric or zwitterionic surfactant, D) 0 to 5% by weight, in particular 0.01 to 1% by weight, of a cationic polymer, E) up to 100% by weight of other components different from C) and / or D). Includes.

[0091] C) Anionic Surfactants Examples of anionic surfactants are soaps, alkylbenzenesulfonates, alkane sulfonates, olefinsulfonates, alkyl ether sulfonates, glycerol ether sulfonates, α-methyl ester sulfonates, sulfofatty acids, alkyl sulfates, fatty alcohol ether sulfates, glycerol ether sulfates, fatty acid ether sulfates, hydroxy mixed ether sulfates, monoglyceride (ether) sulfates, fatty acid amide (ether) 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, N-acylamino acids such as acyl lactylates, acyl tartrates, acyl glutamates and acyl aspartates, alkyl oligoglucoside sulfates, protein fatty acid condensates (especially wheat-based plant products) and alkyl (ether) phosphates. When the anionic surfactant comprises a polyglycol ether chain, the polyglycol ether chain preferably has a narrow homolog distribution, but may also have a conventional homolog distribution. Particularly preferred anionic surfactants in the preparation according to the invention are the alkyl ether sulfates already disclosed in formula (V).

[0092] Alkyl ether sulfates ("ether sulfates") are known anionic surfactants that are produced on an industrial scale by sulfation of fatty alcohol or oxoalcohol polyglycol ethers with SO3 or chlorosulfonic acid (CSA) and subsequent neutralization. Ether sulfates can have both conventional and narrow homolog distributions. They are generally prepared by mixing on average 1-6 mol and preferably 1-3 mol of ethylene oxide with CSA in the form of sodium and / or magnesium salts. 12 / 14 Or C 12 / 18It is particularly preferred to use ether sulfates based on adducts with coconut fatty alcohol fractions.

[0093] Furthermore, in addition to the anionic surfactants, betaine surfactants may be used. Suitable betaine surfactants have already been described as component b) of the concentrates of the invention, preferably betaine surfactants according to formula (I) and / or (II) are useful, in particular betaine surfactants according to formula (II). In particular, the C-glycerol derivatives known under the CTFA name Cocamidopropyl Betaine are 8 / 18 The condensation product of coconut fatty acid-N,N-dimethylaminopropylamide with sodium chloroacetate is preferred.

[0094] D) Cationic polymers Cationic polymers are known deposition agents, i.e., by using personal care compositions, they are deposited on skin and / or hair, giving them a pleasant and soft feel.However, personal care compositions that contain wax dispersions and cationic guar polymers have problems with their stability, and wax tends to settle.This problem can be overcome by adding the concentrate according to the present invention to stabilize wax in personal care compositions.

[0095] Preferred personal care compositions also include cationic polymers, which may include at least one of cationic guar polymers, cationic non-guar galactomannan polymers, cationic tapioca polymers, cationic copolymers of acrylamide monomers and cationic monomers, and / or synthetic non-crosslinked cationic polymers. Suitable cationic polymers are, for example, cationic cellulose derivatives, such as quaternized hydroxyethylcellulose available from Amerchol under the name Polymer JR 400®, cationic starch, copolymers of diallyl ammonium salts and acrylamide, quaternized vinylpyrrolidone / vinylimidazole polymers, such as, for example, Luviquat® (BASF), condensation products of polyglycols with amines, quaternized collagen polypeptides, such as, for example, lauryldimonium hydroxypropyl hydrolyzed collagen (Lamequat® L, Grünau), quaternized wheat polypeptides, polyethyleneimine, cationic silicone polymers, such as, for example, amodimethicone, copolymers of adipic acid and dimethylaminohydroxypropyldiethylenetriamine (Cartaretine®, Sandoz), copolymers of acrylic acid and dimethyldiallyl ammonium chloride (Merquat®), 550, Chemviron), polyaminopolyamides and their crosslinked water-soluble polymers, cationic chitin derivatives such as quaternized chitosan, optionally in microcrystalline distribution, condensation products of dihaloalkyls, such as dibromobutane, with bis-dialkylamines, such as bis-dimethylamino-1,3-propane, cationic guar gums, such as Jaguar® CBS, Jaguar® C-17, Jaguar® C-16 from Celanese, quaternized ammonium salt polymers, such as Mirapol® A-15, Mirapol® AD-1, Mirapol® AZ-1 from Miranol.

[0096] In particular, the personal care composition may comprise a cationic polymer selected from the group consisting of cationically modified cellulose derivatives, PQ10, PQ67, cationically modified guar derivatives such as Dehyquart® Guar N, guar hydroxypropyltrimonium chloride, acrylamide-based cationic homopolymers or copolymers, vinylpyrrolidone-based cationic homopolymers or copolymers, quaternized vinylimidazole-based cationic homopolymers or copolymers, and methacrylate-based cationic homopolymers or copolymers.

[0097] In particular there are cationically modified guar derivatives, preferably guar hydroxypropyltrimonium chloride.

[0098] E) Other ingredients Depending on the end use, cosmetic formulations may contain a range of further auxiliaries and additives such as, for example, water, bodying agents, viscosity reducers, thickeners, salts, superfatting agents, stabilizers, polymers, fats, waxes, silicones, lecithins, protein hydrolysates, phospholipids, bioactive ingredients, UV sun protection factors, antioxidants, deodorants, antiperspirants, antidandruff agents, film formers, swelling agents, insect repellents, self-tanning agents, tyrosinase inhibitors (bleaching agents), hydrotropes, solubilizers, preservatives, perfume oils, pigments, etc. (including water).

[0099] To reduce the viscosity, the personal care composition may further comprise a polyol as an optional ingredient. Suitable polyols preferably contain 2 to 15 carbon atoms and at least two hydroxyl groups. The polyol may contain other functional groups, more particularly amino groups, or may be modified with nitrogen. Typical examples are the following: Glycerol; Alkylene glycols, such as ethylene glycol, diethylene glycol, propylene glycol, butylene glycol, hexylene glycol and polyethylene glycol having an average molecular weight of 100 to 1,000 daltons; technical oligoglycerol mixtures having a degree of self-condensation of 1.5 to 10, such as, for example, technical diglycerol mixtures having a diglycerol content of 40 to 50% by weight; Methylol compounds, in particular trimethylolethane, trimethylolpropane, trimethylolbutane, pentaerythritol and dipentaerythritol; Lower alkyl glucosides, in particular those containing 1 to 8 carbon atoms in the alkyl group, such as methyl glucoside and butyl glucoside; sugar alcohols containing 5 to 12 carbon atoms, such as sorbitol or mannitol; sugars containing 5 to 12 carbon atoms, such as glucose or sucrose; Amino sugars, e.g. glucamine; Dialcoholamines, such as diethanolamine or 2-aminopropane-1,3-diol.

[0100] The polyol is typically used in an amount of 0.1 to 10%, preferably 0.5 to 5%, more particularly 0.7 to 3% by weight of the personal care composition. When a large amount of polyol, preferably glycerol or ethylene glycol, is used, the concentrate is simultaneously stabilized against microbial attack.

[0101] Suitable oily components are, for example, Guerbet alcohols, which are based on fatty alcohols containing 6 to 18, preferably 8 to 10, carbon atoms; linear C 6-22 Fatty acids and linear C 6-22 Esters with fatty alcohols, branched chain C 6-13 Carboxylic acids and linear C 6-22Esters with fatty alcohols, for example myristyl myristate, myristyl palmitate, myristyl stearate, myristyl isostearate, myristyl oleate, myristyl behenate, myristyl erucate, cetyl myristate, cetyl palmitate, cetyl stearate, cetyl isostearate, cetyl oleate, cetyl behenate, cetyl erucate, stearyl myristate, stearyl palmitate, stearyl stearate, stearyl isostearate, stearyl oleate, stearyl behenate, stearyl erucate, isostearyl myristate, isostearyl palmitate, isostearyl stearyl ester, isostearyl isostearate, isostearyl oleate, isostearyl behenate, isostearyl oleate, oleyl myristate, oleyl palmitate, oleyl stearate, oleyl isostearate, oleyl oleate, oleyl behenate, oleyl erucate, behenyl myristate, behenyl palmitate, behenyl stearate, behenyl isostearate, behenyl oleate, behenyl behenate, behenyl erucate, erucyl myristate, erucyl palmitate, erucyl stearate, erucyl isostearate, erucyl oleate, erucyl behenate, and erucyl erucate. 6-22 Esters of fatty acids with branched alcohols, more particularly 2-ethylhexanol, hydroxycarboxylic acids with linear or branched C 6-22 Esters with fatty alcohols, more particularly dioctyl maleate, esters of linear and / or branched fatty acids with polyhydric alcohols (e.g. propylene glycol, dimer diol or trimer triol) and / or Guerbet alcohols, C 6-10 Triglycerides based on fatty acids, C 6-18 Fatty acid based liquid monoglyceride / diglyceride / triglyceride mixture, C 6-22 Esters of fatty alcohols and / or Guerbet alcohols with aromatic carboxylic acids, more particularly with benzoic acid, C 2-12Esters of dicarboxylic acids with linear or branched alcohols containing 1 to 22 carbon atoms or polyols containing 2 to 10 carbon atoms and 2 to 6 hydroxyl groups, vegetable oils, branched primary alcohols, substituted cyclohexanes, linear and branched C 6-22 Fatty alcohol carbonates, Guerbet carbonates, benzoic acid and linear and / or branched C 6-22 Also suitable are esters with alcohols (e.g. Finsolv® TN), linear or branched, symmetrical or asymmetrical dialkyl ethers containing 6 to 22 carbon atoms per alkyl group, ring-opening products of epoxidized fatty acid esters with polyols, silicone oils and / or aliphatic or naphthenic hydrocarbons, such as squalane, squalene or dialkylcyclohexanes.

[0102] Superfatting agents can be selected from materials such as lanolin and lecithin, as well as polyethoxylated or acylated lanolin and lecithin derivatives, polyol fatty acid esters, monoglycerides and fatty acid alkanolamides, which also act as foam stabilizers.

[0103] The consistency factors mainly used are fatty alcohols or hydroxyfatty alcohols containing 12 to 22, preferably 16 to 18, carbon atoms, and also partial glycerides, fatty acids or hydroxyfatty acids. Preferably, a combination of these substances with alkyl oligoglucosides and / or fatty acid N-methylglucamides of the same chain length and / or polyglycerol poly-12-hydroxystearates is used.

[0104] Suitable thickeners are, for example, Aerosil types (hydrophilic silicas), polysaccharides, more especially xanthan gum, guar-guar, agar-agar, alginates and tyloses, carboxymethylcellulose and hydroxyethylcellulose, furthermore also relatively high molecular weight polyethylene glycol mono- and diesters of fatty acids, polyacrylates (e.g. Carbopols® [Goodrich] or Synthalens® [Sigma]), polyacrylamides, polyvinyl alcohols and polyvinylpyrrolidones, surfactants, such as, for example, ethoxylated fatty acid glycerides, esters of fatty acids with polyols, for example pentaerythritol or trimethylolpropane, narrow-range fatty alcohol ethoxylates or alkyl oligoglucosides, and electrolytes, such as, for example, sodium chloride and ammonium chloride.

[0105] Suitable silicone compounds are, for example, dimethylpolysiloxanes, methylphenylpolysiloxanes, cyclic silicones and amino-, fatty acid-, alcohol-, polyether-, epoxy-, fluorine-, glycoside- and / or alkyl-modified silicone compounds, which can be both liquid-like and resin-like at room temperature. Another suitable silicone compound is simethicone, which is a mixture of dimethicone and hydrogenated silicate with an average chain length of 200-300 dimethylsiloxane units. Typical examples of fats are glycerides, suitable waxes are, inter alia, natural waxes such as candelilla wax, carnauba wax, Japan wax, espartograss wax, cork wax, guaruma wax, rice oil wax, sugarcane wax, ouricury wax, montan wax, beeswax, shellac wax, spermaceti, lanolin (wool wax), uropygial fat, ceresin, ozocerite (earth wax), petrolatum, paraffin wax, microwaxes, etc.; chemically modified waxes (hard waxes), such as montan ester wax, sasol wax, hydrogenated jojoba wax, etc., and synthetic waxes such as polyalkylene waxes and polyethylene glycol waxes.

[0106] Metal salts of fatty acids, such as magnesium, aluminum and / or zinc stearates or ricinoleates, can be used as stabilizers.

[0107] Salts such as sodium chloride may be included as a by-product.

[0108] In the context of the present invention, biogenic agents are, for example, tocopherol, tocopherol acetate, tocopherol palmitate, ascorbic acid, deoxyribonucleic acid, retinol, bisabolol, allantoin, phytantriol, panthenol, AHA acids, amino acids, ceramides, pseudoceramides, essential oils, plant extracts and vitamin complexes.

[0109] Furthermore, film-forming agents may be present. Conventional film-forming agents are, for example, chitosan, microcrystalline chitosan, quaternized chitosan, polyvinylpyrrolidone, vinylpyrrolidone-vinyl acetate copolymers, polymers of the acrylic acid series, quaternary cellulose derivatives, collagen, hyaluronic acid and its salts, and similar compounds.

[0110] If desired, further protein hydrolysates known from the prior art, for example based on keratin, can be used, such as the commercially available Nutrilan® Keratin W PP, or wheat-based protein hydrolysates Gluadin® WLM Benz, Gluadin® WK or Gluadin® WP, etc. It is also possible to add small amounts of free amino acids, such as lysine or arginine.

[0111] Cosmetic deodorants attenuate, mask or eliminate body odor. Body odor is formed through the action of skin bacteria on apocrine perspiration, which leads to the formation of unpleasant odorous decomposition products. Deodorants therefore contain active ingredients that act as bacteria inhibitors, enzyme inhibitors, odor absorbers or odor masking agents.

[0112] Basically, suitable bacterial inhibitors are any substances acting against gram-positive bacteria, such as 4-hydroxybenzoic acid and its salts and esters, N-(4-chlorophenyl)-N'-(3,4-dichlorophenyl)-urea, 2,4,4'-trichloro-2'-hydroxydiphenyl ether (triclosan), 4-chloro-3,5-dimethylphenol, 2,2'-methylene-bis-(6-bromo-4-chlorophenol), 3-methyl-4-(1-methylethyl)-phenol, 2-benzyl-4-chlorophenol, ... -(4-chlorophenoxy)-propane-1,2-diol, 3-iodo-2-propynyl butylcarbamate, chlorhexidine, 3,4,4'-trichlorocarbanilide (TTC), antibacterial fragrances, thymol, thyme oil, eugenol, nettle oil, menthol, mint oil, farnesol, phenoxyethanol, glycerol monolaurate (GML), diglycerol monocaprate (DMC), salicylic acid-N-alkylamides, such as salicylic acid-n-octylamide or salicylic acid-n-decylamide.

[0113] Suitable enzyme inhibitors are, for example, esterase inhibitors.Esterase inhibitors are preferably trialkyl citrates, such as trimethyl citrate, tripropyl citrate, triisopropyl citrate, tributyl citrate and, in particular, triethyl citrate (Hydagen® CAT, Henkel KGaA, Dusseldorf, Germany).Esterase inhibitors inhibit enzyme activity and thus reduce odor formation. Other esterase inhibitors are sterol sulfates or phosphates, such as lanosterol, cholesterol, campesterol, stigmasterol and sitosterol sulfates or phosphates, dicarboxylic acids and their esters, such as glutaric acid, glutaric acid monoethyl ester, glutaric acid diethyl ester, adipic acid, adipic acid monoethyl ester, adipic acid diethyl ester, malonic acid and malonic acid diethyl ester, hydroxycarboxylic acids and their esters, such as citric acid, malic acid, tartaric acid or tartaric acid diethyl ester, and zinc glycinate.

[0114] Suitable odor absorbers are substances that can absorb and largely retain odor-forming compounds. They reduce the partial pressure of the individual components and thus also the rate at which they spread. An important prerequisite in this respect is that the perfume must remain intact. Odor absorbers are not effective against bacteria. They contain as their main components, for example, complex zinc salts of ricinoleic acid, or special perfumes with an almost neutral odor known to experts as "fixateurs", such as extracts of labdanum or styrax, or certain abietic acid derivatives. Odor masking agents are perfumes or perfume oils that, in addition to their odor masking function, impart their specific perfume note to the deodorant. Suitable perfume oils are, for example, mixtures of natural and synthetic fragrances. Natural fragrances include extracts of flowers, stems and leaves, fruits, peels, roots, trees, herbs and grasses, needles and branches, resins and balsams, etc. Animal raw materials such as civet and beaver may also be used. Typical synthetic fragrance compounds are products of the ester, ether, aldehyde, ketone, alcohol and hydrocarbon type. Examples of fragrance compounds of the ester type are benzyl acetate, p-tert.butylcyclohexyl acetate, linalyl acetate, phenylethyl acetate, linalyl benzoate, benzyl formate, allyl cyclohexyl propionate, styrallyl propionate and benzyl salicylate. Examples of ethers include, for example, benzyl ethyl ether, and examples of aldehydes include, for example, linear alkanals containing 8 to 18 carbon atoms, citral, citronellal, citronellyloxyacetaldehyde, cyclamen aldehyde, hydroxycitronellal, lilial and bougeonal. Examples of suitable ketones are ionones and methyl cedryl ketone. Suitable alcohols are anethole, citronellol, eugenol, isoeugenol, geraniol, linalool, phenylethyl alcohol and terpineol.The hydrocarbons include mainly the terpenes and balsams.However, it is preferred to use a mixture of different perfume compounds that together produce a desired fragrance.Other suitable perfume oils are relatively low-volatility essential oils that are mainly used as aroma ingredients.Examples are sage oil, chamomile oil, clove oil, melissa oil, mint oil, cinnamon leaf oil, lime flower oil, juniper berry oil, vetiver oil, olibanum oil, galbanum oil, ladanum oil, and lavandin oil. The following are preferably used, either individually or in the form of a mixture: bergamot oil, dihydromyrcenol, lilial, lyral, citronellol, phenylethyl alcohol, hexylcinnamaldehyde, geraniol, benzyl acetone, cyclamen aldehyde, linalool, Boisambrene Forte, Ambroxan, indole, hedione, sandelice, citrus oil, mandarin oil, orange oil, allyl amyl glycolate, cyclovertal, lavandin oil, clary oil, geranium oil bourbon, cyclohexyl salicylate, Vertofix Coeur, Iso-E-Super, Fixolide NP NP), evernyl, iraldine gamma, phenylacetic acid, geranyl acetate, benzyl acetate, rose oxide, romillat, irotyl and floramat.

[0115] Antiperspirants reduce sweating, thereby reducing underarm wetness and body odor by affecting the activity of eccrine sweat glands. Aqueous or anhydrous antiperspirants typically contain an astringent active agent, such as a salt of aluminum, zirconium or zinc. Suitable antihydrotic agents of this type are, for example, aluminum chloride, aluminum chlorohydrate, aluminum dichlorohydrate, aluminum sesquichlorohydrate, and their complexes, for example with 1,2-propylene glycol, aluminum hydroxyalantoinate, aluminum chloride tartrate, aluminum zirconium trichlorohydrate, aluminum zirconium tetrachlorohydrate, aluminum zirconium pentachlorohydrate, and their complexes, for example with amino acids, such as glycine. Oil-soluble and water-soluble auxiliaries typically encountered in antiperspirants may also be present in relatively small amounts. Such oil-soluble auxiliaries include, for example, anti-irritation, skin-protecting or pleasant-smelling essential oils, synthetic skin protectants and / or oil-soluble perfume oils.

[0116] Typical water-soluble additives are, for example, preservatives, water-soluble flavorings, pH adjusting agents, e.g., buffer mixtures, water-soluble thickening agents, e.g., water-soluble natural or synthetic polymers, e.g., xanthan gum, hydroxyethylcellulose, polyvinylpyrrolidone or high molecular weight polyethylene oxide, and the like.

[0117] Suitable anti-dandruff agents are climbazole, octopirox and zinc pyrithione.

[0118] Standard film-forming agents are, for example, chitosan, microcrystalline chitosan, quaternized chitosan, polyvinylpyrrolidone, vinylpyrrolidone / vinyl acetate copolymers, polymers of the acrylic acid series, quaternary cellulose derivatives, collagen, hyaluronic acid and its salts and similar compounds.

[0119] Additionally, hydrotropes such as ethanol, isopropyl alcohol or polyols may be used to improve the flow behavior.

[0120] Suitable preservatives are, for example, phenoxyethanol, formaldehyde solution, parabens, pentanediol or sorbic acid and other classes of compounds listed in Annex 6, Parts A and B of the Kosmetikverordnung (Cosmetics Directive). Suitable insect repellents are N,N-diethyl-m-toluamide, pentane-1,2-diol or ethyl butylacetylaminopropionate. A suitable self-tanning agent is dihydroxyacetone.

[0121] Suitable perfume oils are mixtures of natural and synthetic fragrances. Natural fragrances include extracts of flowers (lily, lavender, rose, jasmine, neroli, ylang-ylang), stems and leaves (geranium, patchouli, petitgrain), fruits (anise, coriander, caraway, juniper), peels (bergamot, lemon, orange), roots (nutmeg, angelica, celery, cardamom, costus, iris, calmus), wood (pine, sandalwood, guaiacwood, cedarwood, rosewood), herbs and grasses (tarragon, lemongrass, sage, thyme), needles and branches (spruce, fir, pine, pumila), resins and balsams (galbanum, elemi, benzoin, myrrh, olibanum, opoponax), etc. Animal sources, such as civet and beaver, may also be used. Typical synthetic fragrance compounds are products of the ester, ether, aldehyde, ketone, alcohol and hydrocarbon type. Examples of fragrance compounds of the ester type are benzyl acetate, phenoxyethyl isobutyrate, p-tert.butylcyclohexyl acetate, linalyl acetate, dimethylbenzylcarbinyl acetate, phenylethyl acetate, linalyl benzoate, benzyl formate, ethylmethylphenylglycinate, allylcyclohexylpropionate, styralyl propionate and benzyl salicylate. Examples of ethers include benzyl ethyl ether, and examples of aldehydes include linear alkanals containing 8 to 18 carbon atoms, such as citral, citronellal, citronellyloxyacetaldehyde, cyclamen aldehyde, hydroxycitronellal, lilial and bougeonal. Examples of suitable ketones are ionone, isomethyl ionone and methyl cedryl ketone. Suitable alcohols are anethol, citronellol, eugenol, isoeugenol, geraniol, linalool, phenylethyl alcohol and terpineol. Hydrocarbons include mainly terpenes and balsams. However, it is preferred to use mixtures of different perfume compounds which together produce the desired fragrance.Other suitable perfume oils are essential oils of relatively low volatility which are primarily used as aroma components: examples are sage oil, chamomile oil, clove oil, melissa oil, mint oil, cinnamon leaf oil, lime flower oil, juniper berry oil, vetiver oil, olibanum oil, galbanum oil, ladanum oil and lavandin oil. The following are preferably used, either individually or in the form of a mixture: bergamot oil, dihydromyrcenol, lilial, lyral, citronellol, phenylethyl alcohol, hexylcinnamon aldehyde, geraniol, benzyl acetone, cyclamen aldehyde, linalool, Boisambrene Forte, Ambroxan, indole, hedione, sandelice, citrus oil, mandarin oil, orange oil, allyl amyl glycolate, cyclovertal, lavandin oil, clari oil, damascone, geranium oil bourbon, cyclohexyl salicylate, Vertofix Coeur, Iso-E-Super, Fixolide NP NP), evernyl, iraldine gamma, phenylacetic acid, geranyl acetate, benzyl acetate, rose oxide, romillat, irotyl and floramat.

[0122] Dyes which may be used are substances approved for and suitable for use in cosmetics, such as those listed in the publication "Kosmetische Faerbemittel (Cosmetic Colorant)" issued by the Farbstoffkommission der Deutschen Forschungsgemeinschaft (Dyes commission of the German research society), Verlag Chemie, Weinheim, 1984, pp. 81-106. Examples are cochineal red A (CI 16255), patent blue V (CI 42051), indigotine (CI 73015), chloropyrin (CI 75810), quinoline yellow (CI 47005), titanium dioxide (CI 77891), indanthrene blue RS (CI 69800) and madder lake (CI 58000). Luminol may also be present as a luminescent dye. These dyes are usually used in concentrations of 0.001 to 0.1% by weight relative to the total mixture.

[0123] The preparation of the personal care composition is very easy for the manufacturer and time- and energy-efficient, since all preparation steps can be carried out at room temperature.As claimed, a mixture of one or more surfactants C) and optional cationic polymer D) is prepared by mixing at room temperature, and the concentrate A) of the present invention is added to this mixture; optionally, other personal care ingredients E) can be added at the end.It is also possible to blend at least a part of the other ingredients E) with C) and optional D), and then add the concentrate A) of the present invention. EXAMPLES

[0124] Example 1: Concentrate with hydrogenated castor oil as stabilizer (=component A); Corresponding to phase B) in personal care compositions

[0125] Concentrates were prepared by mixing all compounds listed in Table 1 below in the amounts indicated (wt % as active material) at 90°C until homogenous, agitating at 100 rpm for 5-120 minutes, and cooling to room temperature (approximately 25°C).

[0126] The following ingredients were used (active substance = AS):

[0127] Dehyton® PK 45: Cocamidopropyl betaine: 37% by weight active material; 7% by weight sodium chloride and up to 100% by weight water Cutina® HR powder: hydrogenated castor oil; 100% by weight active substance Cetiol® HE: Nonionic surfactant; mono- and diesters of coconut oil-based fatty acid mixtures and glycerol, ethoxylated with 7 moles of ethylene oxide Plantacare® 2000: Aqueous solution of C8-C16 fatty alcohol polyglycosides; INCI: Decyl glucoside; Non-ionic surfactant Plantacare® 818: Aqueous solution of C8-C18 fatty alcohol polyglycosides; INCI coco-glucoside; non-ionic surfactant Texapon® N70: Aqueous solution of the Na salt of C12-C14 alkyl ether sulfate; INCI: Sodium laureth sulfate; anionic surfactant; about 70% active substance.

[0128] [Table 1] TIFF0007603601000004.tif255149

[0129] Table 1 shows that the concentrates without any anionic surfactant are all flowable: their viscosities are significantly lower (up to 20,000 mPas) than those of the concentrates with anionic surfactant (comparative examples), which have a viscous appearance and are not flowable.

[0130] Example 2: Shower cream containing a concentrate according to Example 1 of the invention

[0131] The concentrate according to the invention according to example 1 was used to stabilize the following wax dispersions B) (% by weight on active substance basis): 27.0% by weight of a mixture of about 6% by weight of monoesters and about 94% by weight of diesters of ethylene glycol, where the ester building fatty acids are having about 90-98.5 by weight C18 atoms and 2-10 by weight C16+C20+C22 carbon atoms (as determined by GC; such a product is available as Cutina® KE 2747); 10.15% by weight of sodium laureth sulfate (with 1 EO), 1.73% by weight of cocamidopropyl betaine, 1.55% by weight of glyceryl monooleate, Up to 100% by weight water, citric acid and benzoates.

[0132] Wax dispersion B) is an opacifier and was used in all shower creams of phase A). The dispersed wax had a mean particle size of 1.5-2.5 μm as measured by laser diffraction (Mastersizer 2000®).

[0133] The shower cream described above was prepared by the following steps: all components of phase A were mixed together and stirred at room temperature (23° C.) until they were completely homogenous. Phase A) comprises as D) a cationic polymer (Dehyquart® Guar N); as C) surfactants Texapon® N70 and Dehyton® PK 45; as B) a wax dispersion as characterized above. To phase A) was added the inventive stabilized concentrate A) according to example 1 (=phase B), then phase C) and stirred until the mixture (personal care composition) was completely homogenous.

[0134] [Table 2] TIFF0007603601000006.tif255149TIFF0007603601000007.tif255146

Claims

1. 1. A concentrate for stabilizing a wax dispersion comprising a wax selected from the group consisting of monoesters and / or diesters of monoethylene glycol and / or diethylene glycol, (a) hydrogenated castor oil, (b) a surfactant selected from the group consisting of betaines; (d) other auxiliary substances or additives (including salts), and (e) water; provided that the concentrate is free of anionic surfactants, the sum of the amounts of (a), (b) and (d) is in the range of 30% to 80% by weight, and water totals 100% by weight; the concentrate comprises (a) hydrogenated castor oil in an amount ranging from 0.01 to 7% by weight of the concentrate; and the concentrate comprises betaine (b) in an amount ranging from 10 to 45% by weight based on the concentrate, the wax dispersion comprises a wax selected from the group consisting of mono- and / or diesters of ethylene glycol and a fatty acid mixture, the fatty acid mixture comprising 85-100% by weight of stearic acid and 0-15% by weight of different fatty acids having 12-22 carbon atoms, based on the fatty acid mixture; and A concentrate, wherein the wax dispersion comprises a surfactant.

2. 2. Concentrate according to claim 1, characterized in that the quantitative ratio of betaine (b) to hydrogenated castor oil (a) is in the range from 2:1 to 15:

1.

3. 3. The concentrate according to claim 1 or 2, characterized in that it comprises other auxiliaries or additives (d), including salts, in an amount ranging from 0.1 to 15% by weight relative to the concentrate.

4. A concentrate described in any one of claims 1 to 3, comprising (c) a nonionic emulsifier, the sum of the amounts (a) to (d) being in the range of 30% to 80% by weight, with water totalling 100% by weight.

5. 5. The concentrate according to claim 4, characterized in that it comprises a non-ionic emulsifier (c) selected from the group consisting of fatty alcohol polyglycol ethers, alkylphenol polyglycol ethers, fatty acid polyglycol esters, fatty acid amide polyglycol ethers, fatty amine polyglycol ethers, polyol fatty acid esters or alkoxylated polyol fatty acid esters, alkoxylated triglycerides, mixed ethers or mixed formals, alk(en)yl polyglycosides or partially oxidized alk(en)yl polyglycosides or glucuronic acid derivatives, fatty acid N-alkylglucamides, protein hydrolysates, polysorbates and amine oxides.

6. 6. Concentrate according to claim 4 or 5, characterized in that it comprises emulsifier (c) in a quantity ranging from 0 to 30% by weight relative to the concentrate.

7. The concentrate is (a) 0.5 to 7.0% by weight of hydrogenated castor oil; (b) 30.0 to 40.0% by weight of an amphoteric or zwitterionic surfactant selected from the group consisting of betaines; (d) 5.0 to 10.0% by weight of other auxiliaries or additives (including salts); and (e) Water, in an amount totalling 100% by weight. Concentrate according to any one of claims 1 to 3, characterized in that it consists of

8. The concentrate is (a) 0.5 to 7.0% by weight of hydrogenated castor oil; (b) 10.0 to 35.0% by weight of an amphoteric or zwitterionic surfactant selected from the group consisting of betaines; (c) 5.0 to 30.0 weight percent of a nonionic emulsifier; (d) 2.0 to 10.0% by weight of other auxiliaries or additives (including salts); (e) Water, in an amount totalling 100% by weight. The concentrate according to any one of claims 4 to 6, characterized in that it consists of

9. 9. Concentrate according to any one of the preceding claims, characterized in that it has a viscosity in the range of 8,000 to 25,000 mPas (Brookfield, RVT; spindle 4; 10 rpm; 23).

10. 2. A process for the preparation of the concentrate according to claim 1, characterized in that the concentrate is prepared by mixing components (a), (b) and (d) together, adding required amount of water, heating the mixture to 85°C-90°C and cooling with stirring.

11. A process for the preparation of the concentrate according to claim 4, characterized in that the concentrate is prepared by mixing components (a), (b), (c) and (d) together, adding the required amount of water, heating the mixture to 85°C-90°C and cooling with stirring.

12. Use of the concentrate according to any one of claims 1 to 9 as a stabiliser for wax dispersions comprising waxes selected from the group consisting of mono- and / or diesters of monoethylene glycol and / or diethylene glycol, the wax dispersion comprises a wax selected from the group consisting of mono- and / or diesters of ethylene glycol and a fatty acid mixture, the fatty acid mixture comprising 85-100% by weight of stearic acid and 0-15% by weight of different fatty acids having 12-22 carbon atoms, based on the fatty acid mixture; and The wax dispersion comprises a surfactant.

13. 13. Use of the concentrate according to claim 12, characterized in that the wax dispersion comprises mono- and / or diesters of ethylene glycol having an average particle size, measured via laser diffraction by a Mastersizer 2000®, of 0.8 to 3.5 μm.

14. Use of the concentrate according to claim 12 or 13, characterized in that the concentrate is produced according to claim 10 or 11.

15. Use of the concentrate according to any one of claims 12 to 14, characterized in that the concentrate stabilizes wax dispersions contained in personal care compositions as pearlizing and / or opacifying agents.

16. A) a concentrate according to any one of claims 1 to 9; B) a wax dispersion comprising a wax selected from the group consisting of mono- and / or diesters of ethylene glycol and a fatty acid mixture, the fatty acid mixture comprising 85-100% by weight of stearic acid and 0-15% by weight of different fatty acids having 12-22 carbon atoms, based on the fatty acid mixture, and a surfactant; C) one or more cleansing surfactants selected from the group consisting of anionic surfactants, amphoteric surfactants or zwitterionic surfactants; E) One or more other ingredients different from C). A method for producing a personal care composition comprising:

10. A process for the preparation of a personal care composition, characterized in that one or more surfactants C) and a wax dispersion B) are mixed at room temperature and a concentrate A) according to any one of claims 1 to 9 is added and stirred together, the other ingredients E) may be added before or after the addition of the concentrate A).

17. A) a concentrate according to any one of claims 1 to 9; B) a wax dispersion comprising a wax selected from the group consisting of mono- and / or diesters of ethylene glycol and a fatty acid mixture, the fatty acid mixture comprising 85-100% by weight of stearic acid and 0-15% by weight of different fatty acids having 12-22 carbon atoms, based on the fatty acid mixture, and a surfactant; C) one or more cleansing surfactants selected from the group consisting of anionic surfactants, amphoteric surfactants or zwitterionic surfactants; D) a cationic polymer; and E) one or more other ingredients different from C) and / or D). A method for producing a personal care composition comprising:

10. A process for the preparation of a personal care composition, characterized in that one or more surfactants C) and a wax dispersion B) and a cationic polymer D) are mixed at room temperature, a concentrate A) according to any one of claims 1 to 9 is added and stirred together, the other ingredients E) can be added before or after the addition of the concentrate A).

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