发明授权
US4784667A Oxidation hair dyes comprising diamino-substituted pyridines and amino-substituted aromatics as precursors 失效
包含二氨基取代的吡啶和氨基取代的芳族化合物作为前体的氧化染发剂

Oxidation hair dyes comprising diamino-substituted pyridines and
amino-substituted aromatics as precursors
摘要:
This invention is directed to oxidation hair dye compositions and their use in the dyeing of human hair. The compositions consist essentially of precursors comprising 2,3-diamino-6-methoxy-pyridines and aromatic amines or diamines. The combination of oxidation dye precursors according to the invention gives bright, deep blue dye finishes having high stability to heat and light.
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