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US 4,046,503 AGranted
Developer-coupler hair dyes based on alkoxy-triamino-pyrimidines
AssigneeHenkel & Cie G.m.b.H.
InventorHans Peter Kubersky
Life of this patent
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Abstract
Water-soluble substituted and unsubstituted triamino C.sub.1-4 -alkoxy pyrimidines are effective dyes for hair when oxidized in conjunction with a coupling agent. The oxidation can be performed at alkaline pH at room temperature, with air, and provides long-lasting and light-fast dyeings over a broad color range.
Claims15
A composition of the developer-oxidizer type for the dyeing of hair, consisting essentially of, as developer, a water-soluble triamino C.sub.1-4 alkoxy pryrimidine of the formula:
- ##STR3## wherein R.sub.1 represents C.sub.1-4 alkyl;
- R.sub.2, R.sub.3, R.sub.4 and R.sub.5 each represent the same or different substituents selected from the group consisting of hydrogen, C.sub.1-4 alkyl, C.sub.1-4 hydroxyalkyl, phenyl, C.sub.1-4 alkylphenyl, phenyl-C.sub.1-4 alkyl, and C.sub.1-4 alkoxyphenyl, and wherein R.sub.2 and R.sub.3 or R.sub.4 and R.sub.5 together form a divalent linking member selected from the group consisting of butylene, pentylene, azabutylene, and oxabutylene, or the water-soluble salts thereof, and a water-soluble coupler therefor, said developer and said coupler being present in the molar range of 2:1 to 1:2.
Dependencies are inferred from the claim text.