Direct dyes having a quaternary center with a long aliphatic cha

Organic compounds -- part of the class 532-570 series – Organic compounds – Amino nitrogen containing

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546232, 548577, 558418, 562 67, 562437, 564164, 564165, C07C21163

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active

053609301

ABSTRACT:
Direct dyes having quaternary center with a long aliphatic chain, compositions containing those dyes, and the process of using them to dye hair are disclosed. These dyes have a higher affinity for hair and are more shampoo stable than conventional direct dyes, and produce pleasing uniform dyeing.

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patent: 5256823 (1993-10-01), Chan et al.
Berth et al, Chemical Abstracts, vol. 68(1968) 33094r.
Kaiser et al, Chemical Abstracts, vol. 73(1970) 46629x.

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