Hair dye coupler compounds
AssigneeClairol Incorporated
InventorsYuh-Guo Pan, Alexander Chan, Lana Hochman
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Abstract
The present invention concerns the aminophenols (I) as novel couplers ##STR1## wherein R.sub.1 and R.sub.2 may be the same or different and are hydrogen, alkyl and hydroxyalkyl of from 1 to about 6 carbons in the alkyl moiety, or R.sub.1 and R.sub.2 can also form, together with the nitrogen atom to which they are attached, a morpholine, piperidine or pyrrolidine ring, and R.sub.3 and R.sub.4 are hydrogen, alkyl, acyl and hydroxyalkyl having from 1 to about 6 carbons, and oxidative hair dye compositions containing same along with at least one primary dye intermediate in aqueous or hydroalcoholic media.
Claims9
An oxidative hair dye coupler compound including its acid salts having the structure:
- ##STR10## wherein R.sub.1 and R.sub.2 may be the same or different and are hydrogen or alkyl of from 1 to 6 carbons in the alkyl moiety, and R.sub.3 and R.sub.4 are hydrogen, alkyl and hydroxyalkyl, the alkyl group having from 1 to 6 carbons, said compound (I), when coupled with a paraphenylenediamine primary intermediate providing a dye characterized by a blue to blue-violet color.
Dependencies are inferred from the claim text.