(3,5-diaminophenyl)(2,4-dihydroxyphenyl)methanone and the...

Details (3,5-diaminophenyl)(2,4-dihydroxyphenyl)methanone and the... (3,5-diaminophenyl)(2,4-dihydroxyphenyl)methanone and the...

2004-12-02

2008-11-25

Elhilo, Eisa B (Department: 1796)

Bleaching and dyeing; fluid treatment and chemical modification

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

Hair dyeing

C008S406000, C008S410000, C008S411000, C008S421000, C008S424000, C008S435000

Reexamination Certificate

active

07455697

ABSTRACT:
The object of the present invention are (3,5-diaminophenyl)(2,4-dihydroxyphenyl)methanone and the acid adducts thereof of formula (I), with 0≦n≧2 and HX denoting an inor-ganic or organic acid,the colorant containing these compounds and a method for producing the compounds of formula (I).

REFERENCES:
patent: 5576142 (1996-11-01), Neumann et al.
patent: 2004/0147515 (2004-07-01), Umbricht et al.
patent: 101 28 472 (2002-12-01), None
patent: 102 17 270 (2003-11-01), None
STIC Search Report dated Mar. 12, 2008.

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