Direct dyes having a quaternary center with a long aliphatic cha

Details Direct dyes having a quaternary center with a long aliphatic cha Direct dyes having a quaternary center with a long aliphatic cha

1991-11-01

1992-12-08

Lieberman, Paul

Bleaching and dyeing; fluid treatment and chemical modification

Dyeing involving animal-derived natural fiber material ,...

Hair dyeing

8406, 8407, 8408, 8410, 8414, 8416, 8423, 424 70, A61K 713

Patent

active

051694034

ABSTRACT:
Direct dyes having a 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.

REFERENCES:
patent: 3893802 (1975-07-01), Kalopissis et al.

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