Primary intermediates for oxidative coloration of hair
AssigneeThe Procter & Gamble Company
InventorsMu-Ill Lim, Yuh-Guo Pan
Life of this patent
Estimating the term…
Abstract
Primary intermediates for hair coloring compositions for oxidative dyeing of hair are compounds of the formula (1): 1 wherein R is hydrogen, hydroxy, nitro, amino, halogen, C1 to C5 alkyl or haloalkyl, C1 to C5 alkoxy or cyclic alkoxy, C1 to C5 hydroxyalkyl and C1 to C5 hydroxyalkoxy; Ar is an aromatic group, preferably an aromatic group selected from a furanyl, thienyl, pyridinyl, phenyl, 2,3-dihydro-benzo[1,4]dioxin-5 or -6-yl or benzo[1,3]dioxol-4 or -5-yl group; and y=1 to 3.
Claims24
A compound of formula (1):
- 245
- wherein R is selected from the group consisting of hydrogen, hydroxy, nitro, amino, halogen, C1 to C5 alkyl or haloalkyl, C1 to C5 alkoxy or cyclic alkoxy, C1 to C5 hydroxyalkyl and C1 to C5 hydroxyalkoxy;
- Ar is an aromatic group;
- and y=1 to 3.
A hair dye product comprising a hair dyeing composition containing at least one primary intermediate and at least one coupler and a developer composition containing one or more oxidizing agents, the hair dyeing composition containing a primary intermediate of formula (1):
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- wherein R is selected from the group consisting of hydrogen, hydroxy, nitro, amino, halogen, C1 to C5 alkyl or haloalkyl, C1 to C5 alkoxy or cyclic alkoxy, C1 to C5 hydroxyalkyl and C1 to C5 hydroxyalkoxy;
- Ar is an aromatic group;
- and y=1 to 3.
In a hair dyeing system wherein at least one primary intermediate is reacted with at least one coupler in the presence of an oxidizing agent to produce an oxidative hair dye, the improvement wherein the at least one primary intermediate comprises a compound of the formula (1):
- 253
- wherein R is selected from the group consisting of hydrogen, hydroxy, nitro, amino, halogen, C1 to C5 alkyl or haloalkyl, C1 to C5 alkoxy or cyclic alkoxy, C1 to C5 hydroxyalkyl and C1 to C5 hydroxyalkoxy;
- Ar is an aromatic group;
- and y=1 to 3.
A hair dyeing composition comprising, in a suitable carrier or vehicle, an effective hair dyeing amount of:
- (a) at least one coupler, and
- (b) at least one primary intermediate comprising a compound of the formula (1):
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- wherein R is selected from the group consisting of hydrogen, hydroxy, nitro, amino, halogen, C1 to C5 alkyl or haloalkyl, C1 to C5 alkoxy or cyclic alkoxy, C1 to C5 hydroxyalkyl and C1 to C5 hydroxyalkoxy;
- Ar is an aromatic group;
- and y=1 to 3.
Dependencies are inferred from the claim text.