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US 4,543,425 AGranted
1,3-Diamino-4-(2',2',2',-trifluoroethoxy)-benzene, method of producing the same, and hair coloring composition containing the same
AssigneeWella Aktiengesellschaft
InventorsEugen Konrad, Hans J. Braun, Herbert Mager, Friedrich Noser, Max Bracher
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Abstract
1,3-diamino-4-(2',2',2'-trifluoroethoxy)-benzene, as well as its acid addition salts, are used as new compounds to serve as coupler substance in hair dyeing compositions and yields with known developer substances 1,4-diaminobenzene and 2,5-diaminobenzylalcohol to stable blue tones without any red fraction. Moreover, the new compounds lead to exceptional black tones and ash tones.
Claims16
1,3-diamino-4-(2',2',2'-trifluoroethoxy)-benzene of the formula I ##STR4##
A composition for oxidative dyeing of hair, comprising a combination of
- (A) at least one developer substance customary in hair coloring;
- and
- (B) a coupler substance selected from the group consisting of 1,3-diamino-4-(2',2',2'-trifluoroethoxy)-benzene and the acid addition salts of 1,3-diamino-4-(2',2',2'-trifluoroethoxy)-benzene.
Dependencies are inferred from the claim text.