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US 6,806,372 B1Granted
Coupler for use in oxidative hair dyeing
AssigneeThe Procter & Gamble Company
InventorsMu-Ill Lim, Yuh-Guo Pan, Margaret Popp
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 R2SO4; R3 is selected from C1 to C2 alkyl or hydroxyethyl; R2 is selected from C1 to C22 alkyl and C1 to C22 mono and dihydroxyalkyl; and R is selected from of C1 to C16 alkyl, C1 to C10 hydroxyalkyl, C1 to C6 alkoxyalkyl and benzyl.
Claims10
A compound of formula (1):
- wherein X is selected from the group consisting of halogen and R2SO4;
- R3 is selected from the group consisting of C1 to C2 alkyl or hydroxyethyl;
- R2 is selected from the group consisting of C1 to C22 alkyl and C1 to C22 mono and dihydroxyalkyl;
- and R is selected from the group consisting of C1 to C16 alkyl, C1 to C10 hydroxyalkyl, C1 to C6 alkoxyalkyl and benzyl.
1 more element
Dependencies are inferred from the claim text.