Novel coupler for use in oxidative hair dyeing

Details Novel coupler for use in oxidative hair dyeing Novel coupler for use in oxidative hair dyeing

C - Chemistry, Metallurgy

07

C

C07C 275/40 (2006.01) A61K 8/41 (2006.01) A61Q 5/10 (2006.01) C07C 273/18 (2006.01)

Patent

CA 2424723

Couplers for hair coloring compositions for oxidative dyeing of hair are compounds of the formula (1): wherein X is selected from halogen and R5SO4, R, R1, R2 and R5 are each individually selected from C1 to C22 alkyl and C1 to C22 mono or dihydroxyalkyl and R3 and R4 are each individually selected fro C1 to C6 alkyl groups, C1 to C6 hzdroxyalkyl, C1 to C6 alkoxy, C1 to C6 aminoalkyl or R3 and R4 together from a C1 to C5 alklene group.

Cette invention concerne des copulants pour compositions de coloration de cheveux par teinture oxydative constitués par des composés de formule (I). Dans cette formule, X est pris dans un halogène et R?5¿SO¿4?; R, R?1¿, R?2¿ et R?5¿ sont pris chacun individuellement dans un alkyle en C¿1?-C¿22? et dans un mono- ou dihydroxyalkyle en C¿1?-C¿22? et R?3¿ et R?4 ¿sont pris chacun individuellement dans des groupes alkyle en C¿1?-C¿6?, hydroxyalkyle en C¿1?-C¿6?, alkoxy en C¿1?-C¿6?, aminoalkyle en C¿1?-C¿6?, ou bien R?3¿ et R?4¿ pris ensemble forment un groupe alkylène en C¿1?-C¿5?.

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