Patent ID: 7077869

Claim:
A ready-to-use composition for bleaching and/or permanently reshaping keratin fibers, comprising, in a medium suitable for bleaching, at least one reducing agent and at least one cationic associative polyurethane of formula (Ia): R—X—(P) n -[L-(Y) m ] r -L′-(P′) p —X′—R′ (Ia) wherein: R and R′, which may be identical or different, are each chosen from hydrophobic groups and hydrogen; X and X′, which may be identical or different, are each chosen from groups L″ and groups comprising at least one amine functional group optionally bearing at least one hydrophobic group; L, L′, and L″, which may be identical or different, are each chosen from groups derived from diisocyanates; P and P′, which may be identical or different, are each chosen from groups comprising at least one amine functional group, optionally bearing at least one hydrophobic group; Y is chosen from hydrophilic groups; r is an integer ranging from 1 to 100; and n, m, and p, which may be identical or different, range from 0 to 1000; provided that the at least one cationic associative polyurethane comprises at least one amine functional group chosen from protonated and guaternized amine functional groups and further comprises at least one hydrophobic group.