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US 6,673,966 B2Granted
Coupler for use in oxidative hair dyeing
AssigneeThe Procter & Gamble Company
InventorsMu-Ill Lim, Yuh-Guo Pan, James S. Anderson
Life of this patent
Estimating the term…
Abstract
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 individually selected from C1 to C6 alkyl groups, C1 to C6 hydroxyalkyl, C1 to C6 alkoxy, C1 to C6 aminoalkyl or R3 and R4 together form a C1 to C5 alkylene group.
Claims10
A compound of formula (1):
- wherein X is selected from the group consisting of halogen and R5SO4;
- R, R1, R2 and R5 are each individually selected from the group consisting of C1 to C22 alkyl and C1 to C22 mono or dihydroxyalkyl and R3 and R4 are each individually selected from the group consisting of C1 to C6 alkyl, C1 to C6 hydroxyalkyl, C1 to C6 alkoxy, C1 to C6 aminoalkyl, or R3 and R4 together form a C1 to C5 alkylene group.
Dependencies are inferred from the claim text.