Patent ID: 7060107

Claim:
A composition for oxidation dyeing keratin fibres comprising, in an appropriate dyeing medium, (1) at least one oxidation dye, (2) at least one cyclohomopolymer of dialkyldiallylammonium comprising, as a constituent of the chain, at least one unit of structure (I): wherein: k and t, which may be identical or different, are each chosen from 0 and 1, with the proviso that the sum of k+t is equal to 1; R 12 , which may be identical or different, are each chosen from hydrogen atoms and methyl groups; R 10 and R 11 , which may be identical or different, are each chosen from alkyl groups comprising from 1 to 22 carbon atoms, hydroxyalkyl groups, and C 1 –C 4 amidoalkyl groups; R 10 and R 11 , together with the nitrogen atom to which they are commonly bonded, may additionally form at least one heterocyclic group; Y − is an anion; and (3) at least one quaternary polyammonium polymer chosen from: (i) polymers comprising repeating units of formula (II): wherein: R 1 , R 2 , R 3 and R 4 , which may be identical or different, are each chosen from alkyl groups comprising from 1 to 4 carbon atoms and hydroxyalkyl groups comprising from 1 to 4 carbon atoms; n and p, which may be identical or different, are each chosen from integers ranging from 2 to 20; and X− is an anion chosen from anions derived from inorganic acids and anions derived from organic acids; and (ii) polyquaternary ammonium polymers comprising repeating units of formula (V): wherein: p is an integer ranging from 1 to 6, D is chosen from direct bonds and —(CH 2 ) r —CO— groups, wherein r is a number equal to 4 or 7, and X − is an anion chosen from anions derived from inorganic acids and anions derived from organic acids.