Cosmetic composition containing a polymer comprising a carbosiloxane dendrimer unit

1. A cosmetic composition for making up and/or caring for the skin, comprising a physiologically acceptable medium containing:

at least one vinyl polymer comprising at least one carbosiloxane-dendrimer-derived unit and

from 3% to 10% by weight of a silica, relative to the total weight of the composition,

the ratio by weight between said polymer and said silica is from 1 to 10,

with the provision that said cosmetic composition does not comprise an olefin copolymer, and

with the provision that said cosmetic composition is not a composition containing 21% by weight of cyclopentasiloxane, 4% by weight of a propylsilsesquioxane wax substituted with alkyl units having at least 30 carbon atoms, 15% by weight of an acrylate/polytrimethylsiloxy methacrylate copolymer, 2% by weight of a cetyl PEG/PPG-10/1 dimethicone, 6% by weight of a dimethicone and dimethicone/polyglycerol-3 crosscopolymer, 3% by weight of silica, 1% by weight of nylon-12, 5% by weight of glycerol, 0.4% by weight of phenoxyethanol, 32.6% by weight of water and 10% by weight of a mixture of pigments formulated in cyclopentasiloxane.

2. The composition of claim 1 , in which the at least one vinyl polymer comprising at least one carbosiloxane-dendrimer-derived unit has a side molecular chain containing a carbosiloxane dendrimer structure, and the at least one vinyl polymer is derived from a polymerization:

(A) of 0 to 99.9 parts by weight of a vinyl monomer; and

(B) of 100 to 0.1 parts by weight of a carbosiloxane dendrimer containing a radical-polymerizable organic group, represented by the general formula:

in which Y represents a radical-polymerizable organic group,

R 1 represents an aryl group or an alkyl group having from 1 to 10 carbon atoms, and

X i represents a silylalkyl group which, when i=1, is represented by the formula:

in which R 1 is as defined above,

R 2 represents an alkylene group having from 2 to 10 carbon atoms,

R 3 represents an alkyl group having from 1 to 10 carbon atoms,

X i+1 represents a hydrogen atom, an alkyl group having from 1 to 10 carbon atoms, an aryl group, or the silylalkyl group as defined above with i=i+1;

i is an integer from 1 to 10 which represents the generation of said silylalkyl, and

a i is an integer from 0 to 3;

where said radical-polymerizable organic group contained in the component (B) is selected from the group consisting of:

organic groups containing a methacrylic group or an acrylic group and which are represented by the formulae:

in which R 4 represents a hydrogen atom or an alkyl group,

R 5 represents an alkylene group having from 1 to 10 carbon atoms; and

organic groups containing a styryl group and which are represented by the formula:

in which R 6 represents a hydrogen atom or an alkyl group,

R 7 represents an alkyl group having from 1 to 10 carbon atoms,

R 8 represents an alkylene group having from 1 to 10 carbon atoms,

b is an integer from 0 to 4, and

c is 0 or 1, such that, if c is 0, —(R 8 ) c — represents a bond.

3. The composition as claimed in claim 1 , in which the least one vinyl polymer having at least one carbosiloxane-dendrimer-derived unit is derived from a copolymerization:

(A) of vinyl monomers containing organofluorine groups in the molecule,

(B) optionally of vinyl monomers not containing any organofluorine groups in the molecule, and

(C) of carbosiloxane dendrimers having radical-polymerizable organic groups represented by general formula (III):

in which Y is a radical-polymerizable organic group,

R 1 is an aryl or alkyl group having from 1 to 10 carbon atoms, and

X i is a silylalkyl group represented by formula (II) below:

in which R 1 is as defined above,

R 2 is an alkylene group having from 1 to 10 carbon atoms,

R 3 is an alkyl group having from 1 to 10 carbon atoms, and

X i+1 is a group selected from the group consisting of hydrogen atoms, aryl groups and alkyl groups having up to 10 carbon atoms, and silylalkyl groups X i mentioned above,

where i is an integer from 1 to 10 indicating the generation of said silylalkyl group beginning in each carbosiloxane dendritic structure with a value of 1 for the group X i in formula (III), and

a i is an integer from 0 to 3,

said vinyl polymer having a copolymerization ratio of the component (A) to the component (B) of 0.1 to 100:99.9 to 0% by weight, and a copolymerization ratio of the sum of the component (A) and of the component (B) to the component (C) of 0.1 to 99.9:99.9 to 0.1% by weight.

4. The composition as claimed in claim 3 , in which said radical-polymerizable organic group Y in the component (C) is a group selected from the group consisting of:

organic groups containing acrylic or methacrylic groups represented by the general formula:

in which R 4 is a hydrogen atom or methyl, and

R 5 is an alkylene group having from 1 to 10 carbon atoms

in which R 4 and R 5 are as defined above,

organic groups containing alkenylaryl groups represented by the general formula:

in which R 6 is a hydrogen atom or methyl,

R 7 is an alkyl group having from 1 to 10 carbon atoms,

R 8 is an alkylene group having from 1 to 10 carbon atoms,

b is an integer from 0 to 4 and

c is 0 or 1, and

alkenyl groups having from 2 to 10 carbon atoms.

5. The composition as claimed in claim 1 , in which the at least one vinyl polymer having at least one carbosiloxane-dendrimer-derived unit comprises at least one tri[tri(trimethylsiloxy)silylethyldimethylsiloxy] silylpropyl carbosiloxane-dendrimer-derived unit, corresponding to one of the formulae:

6. The composition as claimed in claim 1 , in which the at least one vinyl polymer having at least one carbosiloxane-dendrimer-derived unit is present in a content with respect to active material ranging from 2% to 20% by weight, relative to the total weight of the composition, with respect to active material of vinyl polymer having at least one carbosiloxane-dendrimer-derived unit.

7. The composition as claimed in claim 1 , in which said silica is a hydrophilic or hydrophobic silica selected from the group consisting of precipitated silicas, fumed silicas, and mixtures thereof.

8. The composition as claimed in claim 1 , in which said silica is present in the form of particles having a mean size ranging from 5 nm to 25 μm.

9. The composition as claimed in claim 1 , said composition comprising from 3.5% to 7% by weight of silica, relative to the total weight of the composition.

10. The composition as claimed in claim 1 , comprising at least one liquid fatty phase.

11. The composition as claimed in claim 1 , comprising at least one lipophilic gelling agent.

12. The composition as claimed in claim 1 , comprising at least one colorant.

13. The composition as claimed in claim 1 , said composition being a foundation.

14. A nontherapeutic method for making up and/or caring for the skin, comprising at least one step of applying, to said skin, at least one layer of a composition as claimed in claim 1 .

15. The composition as claimed in claim 1 , wherein:

the silica is present in an amount of 3.5 to 7 wt % relative to the total weight of the composition; and

the wt % ratio of the vinyl polymer to the silica in the composition is in a range from 1 to 8.

16. The composition as claimed in claim 15 , wherein:

the silica is present in an amount of 5.5 wt % relative to the total weight of the composition; and

the wt % ratio of the vinyl polymer to the silica in the composition is 4.5.