Hair Cosmetic Composition Comprising Silicones and Surfactants, and Cosmetic Treatment Process

Abstract

The present invention relates to a hair cosmetic composition, especially for washing and/or conditioning hair, comprising surfactants and an oil-in-water emulsion that comprises: a silicone mixture comprising a trialkylsilyl terminated dialkylpolysiloxane and an amino silicone; a mixture of emulsifiers comprising one or more nonionic emulsifier, wherein the mixture of emulsifiers has a HLB value from 10 to 16; and water.

The invention also relates to a process for the cosmetic treatment of hair, preferably for washing and/or conditioning hair, using this composition.

Claims

1. A hair composition comprising: (i) one or more surfactants preferably chosen from anionic surfactants, nonionic surfactants, amphoteric surfactants, and mixture thereof, and (ii) an oil-in-water emulsion having D50 particle size of less than 350 nm and comprising: a silicone mixture comprising (i) a trialkylsilyl terminated dialkylpolysiloxane having a viscosity of from 40,000 to less than 100,000 mPa.s at 25 C. and (ii) an amino-silicone having a viscosity of from 1,000 to 15,000 mPa.s at 25 C. and an amine value of from 2 to 10 mg of KOH per gram of amino-silicone; a mixture of emulsifiers comprising one or more nonionic emulsifiers, wherein the mixture of emulsifiers has a HLB value from 10 to 16; and water, wherein the oil-in-water emulsion is present in the hair composition in a quantity ranging of from 0.1% to 15% by weight with respect to the total weight of the hair composition.

2. Composition according to claim 1, wherein the anionic surfactants are chosen, alone or as a mixture, from: C6-C24 and especially C12-C20 alkyl sulfates; C6-C24 and especially C12-C20 alkyl ether sulfates; preferably comprising from 2 to 20 ethylene oxide units; C6-C24 and especially C12-C20 alkylsulfosuccinates, especially laurylsulfosuccinates; C6-C24 and especially C12-C20 alkyl ether sulfosuccinates; (C6-C24)acylisethionates and preferably (C12-C18)acylisethionates; C6-C24 and especially C12-C20 acylsarcosinates; especially palmitoylsarcosinates; (C6-C24)alkyl ether carboxylates, preferably (C12-C20)alkyl ether carboxylates; polyoxyalkylenated (C6-C24)alkyl(amido) ether carboxylic acids and salts thereof, in particular those comprising from 2 to 50 alkylene oxide and in particular ethylene oxide groups; C6-C24 and especially C12-C20 acylglutamates; C6-C24 and especially C12-C20 acylglycinates; in particular in the form of alkali metal or alkaline-earth metal, ammonium or amino alcohol salts.

3. Composition according to any one of the preceding claims, wherein the nonionic surfactants are chosen from: alcohols, -diols and (C.sub.1-20)alkylphenols, these compounds being polyethoxylated and/or polypropoxylated and/or polyglycerolated, the number of ethylene oxide and/or propylene oxide groups possibly ranging from 1 to 100, and the number of glycerol groups possibly ranging from 2 to 30; or alternatively these compounds comprising at least one fatty chain comprising from 8 to 30 carbon atoms and especially from 16 to 30 carbon atoms. condensates of ethylene oxide and of propylene oxide with fatty alcohols; polyethoxylated fatty amides preferably having from 2 to 30 ethylene oxide units, polyglycerolated fatty amides comprising on average from 1 to 5, and in particular from 1.5 to 4, glycerol groups; ethoxylated fatty acid esters of sorbitan preferably containing from 2 to 40 ethylene oxide units, fatty acid esters of sucrose, polyoxyalkylenated and preferably polyoxyethylenated fatty acid esters containing from 2 to 150 mol of ethylene oxide, including oxyethylenated plant oils, N(C6-24 alkyl)glucamine derivatives, amine oxides such as (C10-14 alkyl)amine oxides or N(C10-14 acyl)aminopropylmorpholine oxides. nonionic surfactants of alkyl(poly)glycoside type, represented especially by the following general formula: R.sub.1O(R.sub.2O).sub.t(G).sub.v in which: R.sub.1 represents a linear or branched alkyl or alkenyl radical comprising 6 to 24 carbon atoms and especially 8 to 18 carbon atoms, or an alkylphenyl radical whose linear or branched alkyl radical comprises 6 to 24 carbon atoms and especially 8 to 18 carbon atoms; R2 represents an alkylene radical comprising 2 to 4 carbon atoms, G represents a sugar unit comprising 5 to 6 carbon atoms, t denotes a value ranging from 0 to 10 and preferably 0 to 4, v denotes a value ranging from 1 to 15 and preferably 1 to 4. mono- or polyglycerolated surfactants comprising on average from 1 to 30 glycerol groups, more particularly from 1 to 10 glycerol groups and in particular from 1.5 to 5; and preferably chosen from the compounds of the following formulae: RO[CH.sub.2CH(CH.sub.2OH)O]mH, RO[CH.sub.2CH(OH)CH.sub.2O]mH or RO[CH(CH.sub.2OH)CH.sub.2O]mH; in which formulae: R represents a saturated or unsaturated, linear or branched hydrocarbon-based radical comprising from 8 to 40 carbon atoms and preferably from 10 to 30 carbon atoms; R may optionally comprise heteroatoms, for instance oxygen and nitrogen. m is an integer between 1 and 30, preferably between 1 and 10 and more particularly from 1.5 to 6. (poly)ethoxylated fatty alcohols chosen from alcohols containing from 8 to 30 carbon atoms, and preferably from 12 to 22 carbon atoms, such as those of formula (II): R.sub.3(OCH.sub.2CH.sub.2).sub.cOH with: R.sub.3 representing a linear or branched C.sub.8-C.sub.40 alkyl or alkenyl group, preferably C.sub.8-C.sub.30 alkyl or alkenyl group, optionally substituted with one or more hydroxyl groups, and c is an integer between 1 and 200 inclusive, preferentially between 2 and 150 and more particularly between 4 and 50, most preferably between 8 and 20.

4. Composition according to any one of the preceding claims, wherein the amphoteric surfactants are chosen from: (C.sub.8-C.sub.20)alkylbetaines, sulfobetaines, (C.sub.8-C.sub.20 alkyl)amido(C.sub.2-C.sub.8 alkyl)betaines and (C.sub.8-C.sub.20 alkyl)amido(C.sub.2-C.sub.8 alkyl)sulfobetaines. quaternized secondary or tertiary aliphatic amine derivatives of formula (III) or (IV):
R.sub.aCON(Z)CH.sub.2(CH.sub.2).sub.mN.sup.+(R.sub.b)(R.sub.c)(CH.sub.2COO.sup.) (III) in which: R.sub.a represents a C.sub.10-C.sub.30 alkyl or alkenyl group derived from an acid R.sub.aCOOH preferably present in hydrolysed coconut oil, a heptyl group, a nonyl group or an undecyl group, R.sub.b represents a -hydroxyethyl group, R.sub.c represents a carboxymethyl group; m is equal to 0, 1 or 2, Z represents a hydrogen atom or a hydroxyethyl or carboxymethyl group;
R.sub.aCON(Z)CH.sub.2(CH.sub.2).sub.mN(B)(B) (IV) in which: B represents CH.sub.2CH.sub.2OX, with X representing CH.sub.2COOH, CH.sub.2COOZ, CH.sub.2CH.sub.2COOH, CH.sub.2CH.sub.2COOZ, or a hydrogen atom, B represents (CH.sub.2).sub.zY, with z=1 or 2, and Y representing COOH, COOZ, CH.sub.2CHOHSO.sub.3H or CH.sub.2CHOHSO.sub.3Z, m is equal to 0, 1 or 2, Z represents a hydrogen atom or a hydroxyethyl or carboxymethyl group, Z represents an ion resulting from an alkali or alkaline-earth metal, such as sodium, potassium or magnesium; an ammonium ion; or an ion resulting from an organic amine and in particular from an amino alcohol, such as monoethanolamine, diethanolamine and triethanolamine, monoisopropanolamine, diisopropanolamine or triisopropanolamine, 2-amino-2-methyl-1-propanol, 2-amino-2-methyl-1,3-propanediol and tris(hydroxymethyl)aminomethane, R.sub.a represents a C.sub.10-C.sub.30 alkyl or alkenyl group of an acid R.sub.aCOOH preferably present in hydrolysed linseed oil or coconut oil, an alkyl group, in particular a C.sub.17 alkyl group, and its iso form, or an unsaturated C.sub.17 group. compounds of formula (V): R.sub.aNHCH(Y)(CH.sub.2).sub.nC(O)NH(CH.sub.2)nN(R.sub.d)(R.sub.e) in which: R.sub.a represents a C.sub.10-C.sub.30 alkyl or alkenyl group of an acid R.sub.aC(O)OH preferably present in hydrolysed linseed oil or coconut oil; Y represents the group C(O)OH, C(O)OZ, CH.sub.2CH(OH)SO.sub.3H or the group CH.sub.2CH(OH)SO.sub.3Z, with Z representing a cationic counterion resulting from an alkali metal or alkaline-earth metal, such as sodium, an ammonium ion or an ion resulting from an organic amine; R.sub.d and R.sub.e represent, independently of each other, a C1-C4 alkyl or hydroxyalkyl radical; and n and n denote, independently of each other, an integer ranging from 1 to 3.

5. Composition according to any one of the preceding claims, wherein the composition comprises the surfactant(s) in a total quantity ranging of from 4% to 50% by weight, with respect to the weight of the composition, preferably from 6% to 40% by weight, more preferably from 10% to 30% by weight, even more preferably from 12% to 25% by weight, with respect to the weight of the composition.

6. Composition according to any one of the preceding claims, wherein the trialkylsilyl terminated dialkylpolysiloxanes are of formula (I): R.sub.3SiO(R.sub.2SiO).sub.pSiR.sub.3 wherein: R, same or different, is a monovalent hydrocarbon radical having from 1 to 18 carbon atoms, from 1 to 6 carbon atoms, and p is an integer of from 500 to 2000, preferably of from 1000 to 2000; and preferably are PDMS (polydimethylsiloxanes or dimethicones).

7. Composition according to any one of the preceding claims, wherein the trialkylsilyl terminated dialkylpolysiloxanes have a viscosity of from 40,000 to 70,000 mPa.s at 25 C., more preferably a viscosity of from 51,000 to 70,000 mPa.s at 25 C.

8. Composition according to any one of the preceding claims, wherein the amino silicones are of formula (II): XR.sub.2Si(OSiAR).sub.n(OSiR.sub.2).sub.mOSiR.sub.2X wherein: R, same or different, is a monovalent hydrocarbon radical having from 1 to 18 carbon atoms, preferably from 1 to 6 carbon atoms, X, same or different, is R or a hydroxyl (OH) or a C.sub.1-C.sub.6-alkoxy group; preferably X is R; A is an amino radical of the formula R.sup.1[NR.sup.2R.sup.3].sub.xNR.sup.2.sub.2, or the protonated amino forms of said amino radical, wherein R.sup.1 is a C.sub.1-C.sub.6-alkylene radical, preferably a radical of the formula CH.sub.2CH.sub.2CH.sub.2 or CH.sub.2CH(CH.sub.3)CH.sub.2, R.sup.2, same or different, is a hydrogen atom or a C.sub.1-C.sub.4-alkyl radical, preferably a hydrogen atom, R.sup.3 is a C.sub.1C.sub.6-alkylene radical, preferably a radical of the formula CH.sub.2CH.sub.2, and x is 0 or 1; m+n is an integer from 50 to about 1000, preferably from 50 to 600; preferably, A being an amino radical of the formula R.sup.1[NR.sup.2R.sup.3].sub.xNR.sup.2.sub.2, or the protonated amino forms of said amino radical, wherein R.sup.1 is CH.sub.2CH.sub.2CH.sub.2 or CH.sub.2CH(CH.sub.3)CH.sub.2, R.sup.2 are hydrogen atoms, R.sup.3 is CH.sub.2CH.sub.2, and x is 1.

9. Composition according to any one of the preceding claims, wherein the amino silicones have a viscosity of from 1,500 to 15,000 mPa.s; and/or an amine value of from 3,5 to 8 mg of KOH per gram of amino silicone.

10. Composition according to any one of the preceding claims, wherein the silicone mixture comprises (i) one or more trialkylsilyl terminated dialkylpolysiloxanes having a viscosity of from 40,000 to less than 100,000 mPa.s at 25 C. in a quantity of from 70 to 90% by weight, preferably from 75 to 85% by weight and (ii) one or more amino silicones having a viscosity of from 1,000 to 15,000 mPa.s at 25 C. and an amine value of from 2 to 10 mg of KOH per gram of amino silicone, in a quantity of from 10 to 30% by weight, preferably from 15 to 25% by weight, relative to the total weight of the silicone mixture.

11. Composition according to any one of the preceding claims, wherein the mixture of emulsifiers comprises one or more emulsifiers chosen between: (i) polyoxyalkylene alkyl ethers, especially (poly)ethoxylated fatty alcohols of formula: R.sub.3(OCH.sub.2CH.sub.2).sub.cOH with: R.sub.3 representing a linear or branched C.sub.8-C.sub.40 alkyl or alkenyl group, preferably C.sub.8-C.sub.30 alkyl or alkenyl group, optionally substituted with one or more hydroxyl groups, and c being an integer between 1 and 200 inclusive, preferentially between 2 and 150 and more particularly between 4 and 50, most preferably between 8 and 20. The (poly)ethoxylated fatty alcohols are more particularly fatty alcohols comprising from 8 to 22 carbon atoms, oxyethylenated with 1 to 30 mol of ethylene oxide (1 to 30 OE); (ii) polyoxyalkylene (C8-C32)alkylphenyl ethers, (iii) polyoxyalkylene sorbitan (C8-C32) fatty acid esters, especially polyethoxylated fatty acid esters of sorbitan preferably containing from 2 to 40 ethylene oxide units, most preferably from 2 to 20 ethylene oxide units; preferably polyoxyethylenated sorbitan (C10-C24) fatty acid esters preferably containing from 2 to 40 ethylene oxide units, most preferably from 2 to 20 ethylene oxide units; and (iv) polyoxyethylenated (C8-C32) fatty acid esters containing for example from 2 to 150 mol of ethylene oxide; preferably polyoxyethylenated (C10-C24) fatty acid esters containing for example from 2 to 150 mol of ethylene oxide.

12. Composition according to any one of the preceding claims, wherein the oil-in-water emulsion comprises: the mixture of emulsifiers in a total amount of from 5 to 15% by weight, preferably of from 8 to 15% by weight, most preferably of from 10 to 12% by weight, relative to the total weight of the emulsion; and/or nonionic emulsifiers in a total amount of from 5 to 15% by weight, preferably of from 8 to 15% by weight, most preferably of from 10 to 12% by weight, relative to the total weight of the emulsion; and/or cationic emulsifiers in a total amount of from 0,5 to 1,5% by weight, relative to the total weight of the emulsion; and/or the silicone mixture in a total amount of from 40 to 60% by weight, preferably of from 45 to 55% by weight, relative to the total weight of the emulsion; and/or the trialkylsilyl terminated dialkylpolysiloxane(s) in a total amount of from 35 to 45% by weight, preferably of from 38-42% by weight, relative to the total weight of the emulsion; and/or the amino silicone(s) in a total amount of from 5 to 15% by weight, preferably of from 8-12% by weight, relative to the total weight of the emulsion; and/or water in an amount of from 25 to 50% by weight, preferably of from 30 to 45% by weight, most preferably of from 35 to 42% by weight, relative to the total weight of the emulsion.

13. Composition according to any one of the preceding claims having a D.sub.50 particle size of from 100 to 300 nm, more preferably from 150 to 250 nm, most preferably from 160 to 200 nm, expressed in volume.

14. Composition according to any one of the preceding claims, comprising the oil-in-water emulsion in a quantity ranging of from 0.1% to 15% by weight, preferably from 0,5% to 10% by weight, more preferably from 1% to 8% by weight, even more preferably from 1,5% to 5% by weight, with respect to the total weight of the composition.

15. Composition according to any one of the preceding claims, further comprising one or more cationic polymers, preferably in an amount of between 0.01% and 5% by weight, especially from 0.05% to 3% by weight and preferentially from 0.1% to 2% by weight, relative to the total weight of the composition.

16. Composition according to any one of the preceding claims, further comprising one or more oxyethylenated polymers, preferably of formula: (OCH.sub.2CH.sub.2).sub.aOH in which n is an integer ranging from 7000 to 90 000, preferably from 10 000 to 75 000, more preferably from 25 000 to 65 000, even more preferably from 35 000 to 55 000; preferably in an amount ranging from 0,001% to 5% by weight and better still from 0,005% to 3% by weight, and even more preferably from 0,01% to 1% by weight, relative to the total weight of the composition.

17. Composition according to any one of the preceding claims, comprising water, for example in a quantity of from 40 to 99% by weight, preferably from 50 to 98% by weight, most preferably from 55 to 95% by weight, relative to the total weight of the composition.

18. Process for the cosmetic treatment of hair, preferably for washing and/or conditioning hair, comprising the steps of applying to the hair, preferably in a wet state, the composition according to any one of claims 1 to 17, and optionally rinsing them with water after an optional leave-on time.

Description

EXAMPLE 1: PREPARATION OF THE OIL-IN-WATER EMULSION

[0334] Transfer 450 g of amino silicone fluid (trimethylsilyl terminated aminoethylaminopropylmethylsiloxanedimethylsiloxane copolymer with amine value of 7,2 mg of KOH/gm sample, and a viscosity of 5600 mPa.s at 25 C.) in emulsion tank. Start stirring and under stirring condition transfer 1800 g of trimethylsilyl terminated dimethylsiloxane polymer fluid of viscosity 61,500 mPa.s at 25 C. in the same tank. Mix both the fluids for 2 hours at room temperature.

[0335] In a separate tank, transfer 49 g of steareth-6, 62 g of PEG100 stearate and heat to 60 C. Maintain the temperature till both emulsifiers become liquid. Then add 31 g of trideceth-3 and 350 g of trideceth-10 (80% of active matter). This nonionic emulsifiers mixture has an HLB value=11.25.

[0336] Then add 80 g water and 6.2 g glacial acetic acid in the tank and start mixing. Continue mixing till whole mass become a creamy paste. Whole paste is transfer to emulsion tank. Homogenize for 30 minutes at room temperature. Add 79.6 g demineralized water and homogenize for 60 minutes. Add 72.7 g demineralized water and homogenize for 50 minutes. Add 197.4 g demineralized water and homogenize for 5 minutes. Add 294.3 g demineralized water and homogenize for 5 minutes. Add 180 g demineralized water and homogenize for 5 minutes. Add 180 g demineralized water and homogenize for 5 minutes. Add 197.4 g demineralized water and homogenize for 5 minutes. Add 197.4 g demineralized water and homogenize for 3 minutes. Add 228.5 g demineralized water and homogenize for 3 minutes. Lastly add 40.5 g 2-phenoxyethanol as a biocide and homogenize for 3 minutes.

[0337] An stable oil-in-water emulsion having D50 particle size of 170 nm is obtained.

EXAMPLE 2: HAIR COMPOSITION

[0338] The following composition is prepared from the ingredients indicated in the table below, in which the amounts are given as mass percentages of active material relative to the total weight of the composition (% AM=% active matter).

TABLE-US-00001 Ingredient % by weight Sodium laureth sulfate (1 OE) 14% AM Cocoylamidopropyl betaine 1.5% AM Guar hydroxylpropyltrimonium chloride 0.25% Carbomer 0.17% Oil-in-water emulsion from example 1 3.6% Glycerol 0.5% PEG-45M (Polyox WSR N 60 K from Dow Chemical) 0.03% AM Glycol distearate 1.6% Hexylene glycol 0.4% NaCl 1% Fragrance, preservatives qs Water qsp 100%

[0339] The composition could be used as a shampoo; it has a pleasant pearlescent appearance and provides good conditioning effects. The foaming properties (foam quality and quantity) are also very good.

[0340] The composition is then applied on hair strands. The amount of silicones deposited on the hair is measured after one application. The composition is able to deposit 723 pg of silicone per gram of hair.

[0341] The quantity of silicones deposited on the hair is determined by measuring silicium levels using X-ray fluorescence (RC-ANA-MET-1248). Spectrochemical analysis by wavelength dispersive x-ray fluorescence (WDXRF) is based on radiation emissions (spectral lines) characteristic of the chemical element, produced by the impact of high energy photons dispensed by an X-ray tube. Analysis of this fluorescent radiation is performed by counting the number of photons. In this case, i.e. WDXRF, the method consists in separating the photons before counting them using crystal diffraction and positioning the detector at a given wavelength (proportional gas flow counter or a scintillator). The lock to be analysed is prepared by cutting the hair finely with a pair of hairdressing scissors. The finely cut hair thus obtained is then placed in the cassette for analysis.

[0342] The type of hair (natural or sensitised) does not influence the results.

[0343] Instrument: WDXRF Optim'x Thermofisher (Wavelength Dispersion) from Thermo

[0344] Characteristics and Operational Parameters:

[0345] H 126 cm, W 88 cm, D 82 cm, weight-260 kg

[0346] Gas Flow HeliumArgon/Methane (90/10)

[0347] X-ray tube (Rh), Cristal PET and detector FPC

[0348] Tension 25 kv-2 mA

[0349] 3 measurements/sample=60 s/measurement

[0350] minimum sample size 250 mg (2 mm pieces)

[0351] Key Performance Parameters:

[0352] Accuracy : 206 ppm88%; 790 ppm101%; 1925 ppm100%

[0353] Sensitivity: 80 ppm of Si (LOQ).

EXAMPLE 3: INFLUENCE OF THE HLB

[0354] 3 oil-in-water emulsions have been prepared as follows:

[0355] Step 1: Same for the 3 Emulsions

[0356] Transfer 450 g of amino silicone fluid (trimethylsilyl terminated aminoethylaminopropylmethylsiloxanedimethylsiloxane copolymer with amine value of 7,2 mg of KOH/gm sample, and a viscosity of 5600 mPa.s at 25 C.) in emulsion tank. Start stirring and under stirring condition transfer 1800 g of trimethylsilyl terminated dimethylsiloxane polymer fluid of viscosity 61,500 mPa.s at 25 C. in the same tank.

[0357] Mix both the fluids for 2 hours at room temperature.

[0358] Step 2:

[0359] For emulsion A according to the invention:

[0360] In a separate tank, transfer 49 g of steareth-6, 62 g of PEG100 stearate and heat to 60 C. Maintain the temperature till both emulsifiers become liquid. Then add 31 g of trideceth-3 and 350 g of trideceth-10 (80% of active matter). This nonionic emulsifiers mixture has an HLB value=11.25.

[0361] For Comparative Emulsion B:

[0362] In a separate tank, transfer 49 g of steareth-6, 30 g of PEG100 stearate and heat to 60 C. Maintain the temperature till both emulsifiers become liquid. Then add 300 g of trideceth-3, 100 g of trideceth-10 (80% of active matter). This nonionic emulsifiers mixture has an HLB value=8.44.

[0363] For Comparative Emulsion C:

[0364] In a separate tank, transfer 49 g of steareth-6, 350 g of PEG100 stearate and heat to 60 C. Maintain the temperature till both emulsifiers become liquid. Then add 31 g of trideceth-3, 50 g of trideceth-10 (80% of active matter). This nonionic emulsifiers mixture has an HLB value=16.474.

[0365] Step 3: Same for the 3 Emulsions

[0366] Then add 80 g water and 6.2 g glacial acetic acid in the tank and start mixing. Continue mixing till whole mass become a creamy paste. Whole paste is transfer to emulsion tank. Homogenize for 30 minutes at room temperature. Add 79.6 g demineralized water and homogenize for 60 minutes. Add 72.7 g demineralized water and homogenize for 50 minutes. Add 197.4 g demineralized water and homogenize for 5 minutes. Add 294.3 g demineralized water and homogenize for 5 minutes. Add 180 g demineralized water and homogenize for 5 minutes. Add 180 g demineralized water and homogenize for 5 minutes. Add 197.4 g demineralized water and homogenize for 5 minutes. Add 197.4 g demineralized water and homogenize for 3 minutes. Add 228.5 g demineralized water and homogenize for 3 minutes. Lastly add 40.5 g 2-phenoxyethanol as a biocide and homogenize for 3 minutes.

[0367] Results:

TABLE-US-00002 Emulsion A The emulsion is stable Particle size: 170 nm (HLB = 11.25) Emulsion B The emulsion is unstable Particle size: 1135 nm (HLB = 8.44) Emulsion C The emulsion is unstable Particle size: 754 nm (HLB = 16.474)

[0368] The emulsion according to the invention, in which the HLB of the nonionic emulsifiers mixture is in the claimed range, is stable and has a very low particle size. This is not the case with the comparative emulsions, in which the HLB of the emulsifiers mixture is outside the claimed range.

EXAMPLE 4

[0369] Different oil-in-water emulsions have been prepared according to example 1 (HLB=11.25). All the emulsions are stable.

TABLE-US-00003 trimethylsilyl terminated dimethyl- Aminosilicone Aminosilicone siloxane viscosity viscosity amine value (mPa .Math. s) (mPa .Math. s) (mg of KOH/g Particle at 25 C. at 25 C. sample) size Emulsion A 61000 5600 7.5 186 nm (invention) Emulsion B 61000 5000 1.1 630 nm (comparative) Emulsion C 61000 5700 20.87 180 nm (comparative) Emulsion D 38000 5600 7.5 169 nm (comparative) Emulsion E 150 000 5600 7.5 350 nm (comparative)

[0370] The following hair compositions were prepared (AM=active matter):

TABLE-US-00004 Ingredient % by weight Sodium laureth sulfate (1 OE) 13.86% AM Cocoylamidopropyl betaine 1.48% AM Guar hydroxylpropyltrimonium chloride 0.25% Carbomer 0.36% Oil-in-water emulsion 3.6% * Glycerol 0.5% PEG-45M (Polyox WSR N 60 K from Dow Chemical) 0.015% AM Glycol distearate 0.16% Hexylene glycol 0.12% NaCl 1% Fragrance, preservatives qs Water qsp 100% * corresponds to the quantity of emulsion as such.

[0371] Friction Test (Combing Force)

[0372] The hair swatches to be tested (1 g and 400 mm length of medium-bleached European hair SA20) are previously immersed in boiling petroleum-ether, at a range temperature of 60-80, for 1 hour. Then they are rinsed and dried in open air. Then, they are washed with an aqueous solution of 1% by weight of sodium lauryl ether sulfate (100 ml of solution per 2.5-3.0 gram of hair), rinsed and dried in open air.

[0373] Then, the hair swatches are washed with the composition to be tested: a quantity of 0,1 gram of the composition is applied per gram of hair; then the hair are rinsed and the friction is measured on wet hair.

[0374] The friction and combing force is evaluated by using a TA.XT plus Texture Analyzer from Stable Micro Systems Machine.

[0375] The metallic comb is attached horizontally and tightened with the screws. The hair tress is fixed within the clip of upper zig. The comb height is calibrated. The speed of the comb is 5 mm/s and the test is run for 10 times.

[0376] For fiction measurement, the hair swatch is measured by using a friction probe attachment which is 60 g of weight, the contact area with hair being approximately 1 cm.sup.2, and is placed on the hair swatch and moved at a speed of 5 mm/s to measure the friction value.

[0377] The whole length of hair swatch is measured for the friction value and the friction value is obtained in grams.

[0378] The value obtained in grams could be multiplied by 400 mm length to obtain the result in g.mm.

[0379] 3 swatches are measured, per composition.

[0380] The results are mentioned in the table below:

TABLE-US-00005 Wet Friction Std (g .Math. mm) deviation Composition containing emulsion A 4300 48 Composition containing emulsion B 6560 151 Composition containing emulsion C 14000 390 Composition containing emulsion D 8495 138 Composition containing emulsion E 7800 115

[0381] Conclusion: the invention shows significantly better performance on wet combing properties on hair, thus improving cosmeticity of hair fibres.