Patent ID: 8337822

Claim:
A method for treating keratinous fibers, comprising applying to said keratinous fibers an anhydrous cosmetic composition comprising at least one nonionic polysiloxane/polyurea block copolymer of formula (I): wherein: R is a monovalent C 1 -C 20 hydrocarbon radical, optionally substituted by at least one atom chosen from fluorine and chlorine atoms, X is a C 1 -C 20 alkylene radical, in which nonneighboring methylene units can be replaced by —O— radicals, A is chosen from an oxygen atom and an amino radical —NR′—, Z is chosen from an oxygen atom and an amino radical —NR′—, R′ is chosen from a hydrogen atom and a C 1 -C 10 alkyl radical, Y is a divalent C 1 -C 20 hydrocarbon radical, optionally substituted with fluorine or chlorine, D is chosen from a C 1 -C 700 alkylene radical, optionally substituted with a group chosen from fluorine, chlorine, C 1 -C 6 alkyl and C 1 -C 6 alkyl ester, in which nonneighboring methylene units can be replaced by —O—, —COO—, —OCO— or —OCOO— radicals, n is a number ranging from 1 to 4000, a is a number of at least 1, b is a number ranging from 0 to 40, c is a number ranging from 0 to 30, and d is a number greater than 0, wherein in at least one embodiment, A is, in at least one of the units (a), an NH radical.