Couplers for oxidative coloration of hair

Couplers for hair coloring compositions for oxidative dyeing of hair are compounds of the formula (1): 1 wherein X is Cl, Br, I, or R 4 SO 4 ; R 3 is a C 1 to C 22 alkyl group or a C 1 to C 22 mono or dihydroxyalkyl group; R 1 and R 2 are each independently a C 1 to C 4 alkyl group; and R 4 a C 1 to...

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Main Authors Pan, Yuh-Guo, Lim, Mu-lll, Anderson, James
Format Patent
LanguageEnglish
Published 10.10.2002
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Summary:Couplers for hair coloring compositions for oxidative dyeing of hair are compounds of the formula (1): 1 wherein X is Cl, Br, I, or R 4 SO 4 ; R 3 is a C 1 to C 22 alkyl group or a C 1 to C 22 mono or dihydroxyalkyl group; R 1 and R 2 are each independently a C 1 to C 4 alkyl group; and R 4 a C 1 to C 22 alkyl group or a C 1 to C 22 mono or dihydroxyalkyl group.