Cationic oligomeric azo dyes

Details Cationic oligomeric azo dyes Cationic oligomeric azo dyes

2006-06-07

2010-10-05

Elhilo, Eisa B (Department: 1796)

Bleaching and dyeing; fluid treatment and chemical modification

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

Hair dyeing

C008S407000, C008S437000, C008S466000, C008S565000, C008S566000, C008S567000, C534S753000

Reexamination Certificate

active

07806940

ABSTRACT:
Disclosed are oligomeric cationic azo dyes of formula (1), their salts, isomers, hydrates and other solvates, wherein n, R1, R2, X, Y−and Z+are defined in claims and disclosure.Furthermore, the present invention relates to novel cationic oligomeric azo dyes of formula (1), compositions, thereof, especially comprising other dyes, and to application for hair dyeing.

REFERENCES:
patent: 6306182 (2001-10-01), Chan et al.
patent: 2007/0214580 (2007-09-01), Eliu et al.
patent: 2404661 (2005-02-01), None
patent: 2404661 (2005-09-01), None
patent: 95/01772 (1995-01-01), None
patent: 2005/097051 (2005-10-01), None
STIC Search Report dated Feb. 12, 2010.

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