Heteroaromatic binuclear black direct dyes

Details Heteroaromatic binuclear black direct dyes Heteroaromatic binuclear black direct dyes

2007-10-30

2007-10-30

Elhilo, Eisa (Department: 1751)

Bleaching and dyeing; fluid treatment and chemical modification

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

Hair dyeing

C008S406000, C008S410000, C008S411000, C008S421000, C546S262000, C544S105000

Reexamination Certificate

active

11220688

ABSTRACT:
Disclosed herein are novel heteroaromatic binuclear direct dyes, dye compositions containing these dyes and also a process for dyeing keratin fibers using them. In particular, the invention relates to heteroaromatic binuclear direct dyes comprising a pyridine nucleus.With these novel dyes, black shades that show good fastness can be obtained, and they also may show good stability in dye compositions.

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