Cationic imidazole azo dyes
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 13, 1998
Grant Date -
N/A
app pub date -
Nov 2, 1995
filing date -
Nov 3, 1994
priority date (Note) -
In Force
status (Latency Note)
Importance
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.
First Claim
Other Claims data not available