Oxidative hair cream composition containing polymeric colorant

1. A method for treating hair comprising the steps of:

a. Providing an oxidative hair cream composition comprising at least one oxidizing agent and at least one azo colorant according Formula V:

wherein each R 56 , R 57 , R 58 , R 59 group is independently selected from hydrogen, halogens, methyl, ethyl, propyl, isopropyl, butyl, isobutyl, and tert-butyl group; R 510 is independently selected from the group consisting of hydrogen, deuterium and R v ; each R v is independently selected from the group consisting of halogens, alkyl, substituted alkyl, alkenyl, substituted alkenyl, aryl, substituted aryl, alkynyl, substituted alkynyl, —C(O)O − , —NR x C(O)R y , —NR x C(O)OR y , —NR x C(O)SR y , —NR x C(O)NR y R z , —OR x , —NR x R y , —P(O)(OR x )O − , and —P(O)(O − ) 2 ; R x , R y and R z are independently selected from the group consisting of hydrogen, alkyl, substituted alkyl, alkenyl, substituted alkenyl, aryl, substituted aryl, alkynyl, substituted alkynyl, hydroxyethyl, and R u ; R u is an organic group composed of one or more organic monomers with said monomer molecular weights ranging from 28 to 500;

and

b. Contacting said oxidative hair cream composition with human hair.

2. The method of claim 1 , wherein two or more R 56 , R 57 , R 58 , R 59 , R 510 are connected to each other through covalent bonds to form a ring structure.

3. The method of claim 2 , wherein the ring structure is one of naphthalene, tetrahydroquinoline, tetrahydroisoquinoline, indoline, and isoindoline.

4. The method of claim 3 , wherein the ring structure is substituted by one or more R 56 groups.

5. The method of claim 2 , wherein two of R x , R y , or R z are attached to the same carbon or nitrogen group and form the ring structure.

6. The method of 2 , wherein the ring structure is one of piperazine, piperidine, and pyrrolidine.

7. The method of claim 6 , wherein the ring structure is further substituted by one or more R 56 groups.