Hair dyes: diresorcyl sulphide, sulphoxide or sulphone coupling agents
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United States of America Patent
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Nov 12, 1985
Grant Date -
N/A
app pub date -
Nov 1, 1984
filing date -
Nov 11, 1983
priority date (Note) -
Expired
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Importance
Abstract
Hair dyes containing oxidation dye precursors in a cosmetic carrier contain as coupler substances compounds corresponding to formula I ##STR1## in which Z is a sulfur atom, an >SO group or an >SO.sub.2 group or salts thereof. As developer substances, the hair dyes contain the developers normally used in oxidation hair dyes, preferably aromatic and/or heterocyclic diamines or a 2,4,5,6-tetraamino pyrimidine. The new couplers produce color tones in the brown range with good fastness properties and a negligible tendency towards skin staining.
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