Meta-phenylenediamine coupler compounds and oxidative hair dye compositions and methods using same
AssigneeClairol Incorporated
InventorsKeith C. Brown, John F. Corbett
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Abstract
2-Equivalent oxidative hair dye coupler compounds of the formula (I) ##STR1## wherein X is halogen or OR', wherein R and R' may be the same or different and represent alkyl, mono- or poly-hydroxyalkyl, alkoxyalkyl, alkylphenyl, aminoalkyl, mono- and di-alkylaminoalkyl, phenyl or phenylalkyl except that R and R' are not both methyl, and the acid addition salts thereof are used in oxidative hair dye compositions with conventional para bases. The amount of oxidizing agent can be reduced relative to similar compositions containing 4-equivalent meta coupler compounds. Some of the compounds of formula (I) in which X is OR' are novel compounds as is the elimination of HOR' during the oxidative coupling reaction.
Claims14
An oxidation dye coupler compound of the formula:
- ##STR28## wherein each of R and R' independently represent mono or poly-hydroxy (C.sub.1 -C.sub.4) alkyl or an acid addition salt thereof.
A hair dyeing composition comprising an aqueous mixture of at least one oxidation dye coupler of the following formula:
- ##STR32## wherein R and R' are independently mono or polyhydroxy (C.sub.1 -C.sub.4) alkyl or an acid addition salt thereof, and X represents the group --OR' where R' has the same meaning as R', the groups --OR and --OR' may be the same or different;
- and at least one oxidation base developer compound, said coupler and said developer being reactive with each other in the presence of an oxidizing agent to form a colored dye on hair.
Dependencies are inferred from the claim text.