Patent ID: 7066966

Claim:
A composition for oxidation dyeing of keratin fibers, comprising, in an appropriate dyeing medium, at least one oxidation dye and at least one cationic poly(vinyllactam) polymer comprising: a) at least one monomer chosen from vinyllactam and alkylvinyllactam monomers; b) at least one monomer chosen from those of the following formulae (I) and (II): wherein: X is chosen from an oxygen atom and NR 6 radicals, R 1 and R 6 , which may be identical or different, are chosen from a hydrogen atom and linear and branched C 1 –C 5 alkyl radicals, R 2 is chosen from linear and branched C 1 –C 4 alkyl radicals, R 3 , R 4 and R 5 , which may be identical or different, are chosen from a hydrogen atom, linear and branched C 1 –C 30 alkyl radicals and radicals of formula (III): —(Y 2 ) r —(CH 2 —CH(R 7 )—O) x —R 8 (III) Y, Y 1 and Y 2 , which may be identical or different, are chosen from linear and branched C 2 –C 16 alkylene radicals, R 7 is chosen from a hydrogen atom, linear and branched C 1 –C 4 alkyl radicals, and linear and branched C 1 –C 4 hydroxyalkyl radicals, R 8 is chosen from a hydrogen atom and linear and branched C 1 –C 30 alkyl radicals, p, q and r, which may be identical or different, are each either zero or 1, m and n, which may be identical or different, are each an integer ranging from 0 to 100, x is an integer ranging from 1 to 100, Z − is an anion chosen from organic and inorganic acid anions, wherein: at least one of the substituents R 3 , R 4 , R 5 and R 8 is chosen from linear and branched C 9 –C 30 alkyl radicals, if m or n is different from zero, then q is equal to 1, and if m or n is equal to zero, then p or q is equal to 0.