Cationic imidazole azo dyes

Details Cationic imidazole azo dyes Cationic imidazole azo dyes

1995-11-02

1998-01-13

Higel, Floyd D.

Organic compounds -- part of the class 532-570 series

Organic compounds

Azo

534573, 534589, 534612, D06P 700, D06P 370, C09B 4416

Patent

active

057081514

ABSTRACT:
The cationic imidazole azo dyes of the formulae ##STR1## in which A and A.sub.1 independently of one another are each a radical of the formula ##STR2## Z is the radical of an aliphatic or aromatic diamine, R.sub.1 and R.sub.2 are each hydrogen or substituted or unsubstituted C.sub.1 -C.sub.4 alkyl or, together with the two nitrogen atoms to which they are attached and with Z, form a 5-, 6- or 7-membered ring, X is the radical of a bridging member, n is 2, 3 or 4, Z.sub.1 is the radical of an aromatic diamine, Z.sub.2 is the radical of an aliphatic diamine, KK is the radical of a coupling component, R.sub.3 and R.sub.4 are each hydrogen or substituted or unsubstituted C.sub.1 -C.sub.4 alkyl, R.sub.5 and R.sub.6 independently of one another are each hydrogen or substituted or unsubstituted C.sub.1 -C.sub.4 alkyl or C.sub.1 -C.sub.4 alkoxy and An.sup..crclbar. is a colorless anion, are particularly suitable for the dyeing of paper in red or violet shades having good fastness properties.

REFERENCES:
patent: 3133910 (1964-05-01), Baumann et al.
patent: 3173907 (1965-03-01), Klingsberg et al.
patent: 3271383 (1966-09-01), Yamaya et al.
patent: 3410840 (1968-11-01), Baumann et al.
patent: 4393005 (1983-07-01), Patsch et al.
patent: 4557732 (1985-12-01), Hahnke et al.
patent: 4845209 (1989-07-01), Adam

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