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OXIDATION DYE COUPLER CONNECTION, OXIDATION HAIR COLORING AGENT AND A METHOD FOR COLORING HAIR WITH THIS AGENT.
OXIDATION DYE COUPLER CONNECTION, OXIDATION HAIR COLORING AGENT AND A METHOD FOR COLORING HAIR WITH THIS AGENT.
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机译:氧化染料偶联剂连接,氧化头发着色剂以及用该试剂着色头发的方法。
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摘要
2-Equivalent oxidative hair dye coupler compounds of the formula (I) IMAGE 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.
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