申请人:Link Steven G.
公开号:US20090181170A1
公开(公告)日:2009-07-16
The invention relates to monoazo colorants derived from pyrazolobenzodiazinedioxides of Formula 1:
wherein R
1
and R
2
are hydrogen or any non-metallic group, n is 0-4, R
3
is hydrogen, acyl, aryl, alkenyl, alkynyl or alkyl, A represents an aromatic heterocyclic ring or an aromatic group of Formula 2:
wherein R
6
and R
8
are hydrogen, alkyl, sulfonic acid, or 1-4 carbon alkoxy, R
7
is any non-metallic group, m is 0-3, and R
6
and R
7
, R
7
and R
8
, or, when m>1, two R
7
groups is can be joined to form a fused carbocyclic or heterocyclic aromatic or non-aromatic ring. The invention also relates to an aqueous ink that comprises at least one colorant of Formula 1:
wherein A represents an aromatic or heteroaromatic ring, and A can be bonded to other rings that can be aromatic, aliphatic or heterocyclic, and an ink printing method using the colorant-containing ink.