Cosmetic composition comprising an aqueous dispersion of polysiloxane/polyurea and a silane, cosmetic treatment process and kit therefor

A cosmetic composition comprising:

• (i) an aqueous dispersion of polysiloxane/polyurea copolymer obtained from a reaction between:
• a) at least one polymer of formula (I) bearing at its ends at least one reactive function containing labile hydrogen:
• wherein:
• the radicals R1, identical or different, are selected from the group consisting of (i) linear or branched monovalent C1-C20 hydrocarbon-based radicals, which are optionally unsubstituted or substituted with heteroatoms and (ii) C6-C30 aromatic radicals;
• Y, identical or different, represents a C1-C20 aliphatic, cycloaliphatic or aromatic hydrocarbon-based radical, comprising at least one reactive function containing labile hydrogen;
• and
• n is an integer wherein an average molecular weight of the polysiloxane segment is between 300 and 10 000 g/mol;
• and
• b) at least one diisocyanate-based unit;
• and
• (ii) a silane structure:
• wherein:
• X represents a C1-C6 alkoxy group;
• Y is a C1-C6 alkoxy or C1-C6 alkyl group;
• Z is a linear or branched, saturated or unsaturated C1-C22 hydrocarbon-based chain, which is optionally substituted with an amine group NH2 or NHR (R=C1-C20 alkyl, C3-C40 cycloalkyl or C6-C30 aromatic);
• or with a hydroxyl group, a thiol group, or a substituted or unsubstituted aryl group;
• Z optionally being interrupted with a heteroatom or a carbonyl group (CO);
• n represents an integer equal to 1 or 2.