Cosmetic composition for coating keratin fibres
The present invention relates to a cosmetic composition for coating keratin fibers, comprising:—an aqueous phase,—a surfactant system present at a total content of greater than or equal to 15% by weight relative to the total weight of the composition, said surfactant system comprising: i) at least one non-ionic surfactant with an HLB value at 25° C. of less than 8, and ii) at least one anionic surfactant with an HLB value at 25° C. of greater than or equal to 8, chosen from acyl glutamic acids and salts thereof, together forming a lamellar phase Lβ, and—at least one aqueous dispersion of particles of at least one film-forming polymer. The present invention also relates to a process for coating keratin fibers.
1. A cosmetic composition for coating a keratin fiber, the composition comprising:
an aqueous phase;
a surfactant system present at a total content of greater than or equal to 15% by weight relative to a total weight of the composition, said surfactant system comprising:
i) at least one non-ionic surfactant with an HLB value at 25° C. of less than 8, and
ii) at least one anionic surfactant with an HLB value at 25° C. of greater than or equal to 8 selected from the group consisting of an acyl glutamic acid and a salt thereof, together forming a lamellar phase Lβ;
at least one aqueous dispersion of particles of at least one film-forming polymer; and
optionally one or more waxes which, if present, are present in a wax content of less than 5% by weight relative to the total weight of the composition.
2. The composition according to claim 1 , wherein the at least one non-ionic surfactant is represented by formula (I):
(ALK-[C(O)] a —[O] b ) c —X (I)
where:
ALK is a C 7 -C 23 alkyl group, a and b are independently an integer between 0 and 100,
c is an integer between 1 and 100,
X is a (poly)oxyalkylene group optionally substituted and/or terminated with a hydroxyl group.
3. The composition according to claim 2 , wherein the group X is:
i) HO-(ALK-O) z —CH2—CH[(OALK) y —OH]—CH2-(O-ALK) x -(*)
where:
ALK is independently a C1-C6 alkylene group and,
x, y and z are independently an integer between 0 and 10, with the proviso that x+y+z is other than 0; or
ii) H-(ALK-O) x -(*) and H-(O-ALK) x -(*),
where:
ALK is independently a C1-C6 alkylene group, and
x is an integer other than 0.
4. The composition according to claim 1 , wherein the at least one non-ionic surfactant is represented by formula (I′):
ALK-(O—CH 2 —CH 2 ) n —OH (I′)
where
ALK is a C 8 -C 24 alkyl group, and
n is an integer other than 0.
5. The composition according to claim 1 , wherein the at least one non-ionic surfactant is selected from the group consisting of:
an ester and an ether of a monosaccharide which is optionally (poly)oxyalkylenated;
an ester of a fatty acid, and of a polyol, which is (poly)oxyalkylenated;
an alcohol which is optionally (poly)oxyalkylenated;
and a mixture thereof.
6. The composition according to claim 1 , wherein the at least one non-ionic surfactant comprises an alcohol, which is optionally (poly)oxyalkylenated and comprises an ether of a C 8 -C 24 fatty alcohol and of polyethylene glycol, said ether comprising from 1 to 10 ethylene glycol units.
7. The composition according to claim 1 , wherein the at least one anionic surfactant comprises at least one acyl glutamic acid having at least one C 12 -C 22 acyl chain, a salt thereof, or a mixture thereof.
8. The composition according to claim 1 , wherein the at least one anionic surfactant is present in a content of greater than or equal to 5% by weight relative to the total weight of the composition.
9. The composition according to claim 1 , wherein the at least one non-ionic surfactant is present in a content of greater than or equal to 5% by weight relative to the total weight of the composition.
10. The composition according to claim 1 , wherein the at least one non-ionic surfactant and the at least one anionic surfactant are present in a total content of greater than or equal to 15% by weight relative to the total weight of the composition.
11. The composition according to claim 1 , wherein the at least one non-ionic surfactant and the at least one anionic surfactant are present in a respective total content such that a weight ratio of the at least one non-ionic surfactant to the at least one anionic surfactant ranges from 1/5 to 5/1.
12. The composition according to claim 1 , wherein the particles of the at least one film-forming polymer are radical synthetic polymers, polycondensate synthetic polymers, polymers of natural origin, or a mixture thereof.
13. The composition according to claim 1 , wherein the at least one aqueous dispersion of the particles of the at least one film-forming polymer is an acrylic polymer dispersion, a polyurethane dispersion, a sulfopolyester dispersion, a vinyl dispersion, a polyvinyl acetate dispersion, a vinylpyrrolidone, dimethylaminopropylmethacrylamide and lauryldimethylpropylmethacrylamidoammonium chloride terpolymer dispersion, a dispersion of polyurethane/polyacrylic hybrid polymers, a dispersion of core-shell particles, and a mixture thereof.
14. The composition according to claim 1 , wherein the aqueous phase is present in a content of from 30% to 70% by weight relative to the total weight of the composition.
15. The composition according to claim 1 , which comprises a wax content of less than or equal to 2% by weight relative to the total weight of the composition.
16. The composition according to claim 1 , comprising at least one colorant, which is at least one pulverulent substance.
17. The composition according to claim 1 , having a viscosity at 25° C. ranging from 5 to 50 Pa·s.
18. A process for coating a keratin fibre, the process comprising applying to the keratin fibre the composition according to claim 1 .