Coloring composition

1. Aqueous composition for colouring keratin fibres especially human hair characterised in that it comprises at least one oxidative dye precursor, optionally at least one coupling agent and an aqueous emulsion of divinyldimethicone/dimethicone copolymer with an internal phase viscosity of more than 1×10 8 mm 2 /s measured at 0.01 Hz and at about 25° C. and at least one compound according to general structure

R 1 -A—R 2 —B

wherein R 1 is a saturated or unsaturated, straight or branched alkyl group with 8 to 24 C atoms, R 2 is a straight or branched alkyl group with 1 to 4 C atoms, A is a group selected from O,

and B is selected from

wherein R 3 and R 4 are the same or different is H or an alkyl with 1 to 4 C atoms, hydroxyl alkyl with 1 to 4 C atoms and dihydroxyl alkyl with 2 to 4 C atoms,

R 5 , and R 6 are the same or different, an alkyl with 1 to 4 C atoms, hydroxyl alkyl with 1 to 4 C atoms and dihydroxyl alkyl with 2 to 4 C atoms, R 7 is an alkyl with 1 to 4 C atoms, hydroxyl alkyl with 1 to 4 C atoms or dihydroxyl alkyl with 2 to 4 C atoms and

—R 2 -A—R 1

wherein R 1 , A and R 2 have the above meaning and X is chloride, bromide, methosulfate.

2. Composition according to claim 1 wherein aqueous emulsion of divinyldimethicone/dimethicone copolymer has an internal phase viscosity of more than 1.1×10 8 mm 2 /s, preferably 1.2×10 8 mm 2 /s measured at 0.01 Hz and at about 25° C. and present in the compositions at a concentration of 0.01 to 5% calculated to total composition prior to mixing with any other composition.

3. Composition according to claim 1 , wherein at least one compound according to above given general structure at a concentration of 0.1 to 10% by weight calculated to total composition prior to mixing with any other composition.

4. Composition according to claim 1 , wherein aqueous emulsion of divinyldimethicone/dimethicone copolymer is a nonionic emulsion and comprises one or more nonionic surfactants.

5. Composition according to claim 1 , wherein it comprises at least one direct dye.

6. Composition according to claim 1 , wherein at least one direct dye is selected from cationic and non-ionic nitro dyes present at a concentration of 0.001 to 5% by weight calculated to total composition prior to mixing with any other composition.

7. Composition according to claim 1 , wherein it comprises at least one surfactant selected from non-ionic, cationic, anionic and amphoteric surfactants wherein cationic surfactants are selected from surfactants of the general structure

where R 8 is a saturated or unsaturated, branched or non-branched alkyl chain with 8-24 C atoms R 9 is a hydrogen, saturated or unsaturated, branched or non-branched alkyl chain with 1-24 C atoms and R 10 and R 11 are independent from each other H or lower alkyl chain with 1 to 4 carbon atoms which may be substituted with one or two hydroxyl group, and X is chloride, bromide or methosulfate.

8. Composition according to claim 6 wherein it further comprises at least one fatty alcohol.

9. Composition according to claim 1 , wherein further comprises at least one conditioning agent.

10. Composition according to claim 1 , wherein further comprises additional silicone compounds.

11. Composition according to claim 1 , wherein further comprises one or more organic solvent(s).

12. Composition according to claim 1 , wherein further comprises at least one compound according to the formula

where n is a number from 1 to 10.

13. Composition according to claim 1 , wherein it has a pH between 2 and 11.

14. Process for oxidative colouring hair wherein a composition according to claim 1 is mixed with a composition comprising at least one oxidizing agent and applied onto hair and rinsed off from hair after processing of 10 to 45 min.