Primary intermediates for oxidative coloration of hair
AssigneeThe Procter & Gamble Company
InventorsMu-III Lim, Yuh-Guo Pan
Life of this patent
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Abstract
Primary intermediates for hair coloring compositions for oxidative dyeing of hair are compounds of the formula (1): 1 wherein R is selected from C1 to C5 alkyl or hydroxyalkyl, a C3 to C6 cyclic ring containing hetero atoms selected from O, S and N atoms, and —CH2—Ar where Ar is an aromatic ring wherein the aromatic ring may be substituted with one or two hydroxy C1 to C3 alkoxy, or amino groups.
Claims24
A compound of formula (1):
- 117
- wherein R is selected from the group consisting of C1 to C5 alkyl or hydroxyalkyl, a C3 to C6 cyclic ring containing hetero atoms selected from O, S and N atoms, and —CH2—Ar where Ar is an aromatic ring wherein the aromatic ring may be substituted with one or two hydroxy, C1 to C3 alkoxy, or amino groups.
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):
- 123
- wherein R is selected from the group consisting of C1 to C5 alkyl or hydroxyalkyl, a C3 to C6 cyclic ring containing hetero atoms selected from O, S and N atoms, and —CH2—Ar where Ar is an aromatic ring wherein the aromatic ring may be substituted with one or two hydroxy, C1 to C3 alkoxy, or amino groups.
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):
- 124
- wherein R is selected from the group consisting of C1 to C5 alkyl or hydroxyalkyl, a C3 to C6 cyclic ring containing hetero atoms selected from O, S and N atoms, and —CH2—Ar where Ar is an aromatic ring wherein the aromatic ring may be substituted with one or two hydroxy, C1 to C3 alkoxy, or amino groups.
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):
- 125
- wherein R is selected from the group consisting of C1 to C5 alkyl or hydroxyalkyl, a C3 to C6 cyclic ring containing hetero atoms selected from O, S and N atoms, and —CH2—Ar where Ar is an aromatic ring wherein the aromatic ring may be substituted with one or two hydroxy, C1 to C3 alkoxy, or amino groups.
Dependencies are inferred from the claim text.