Methine-azo compounds containing cyclic ammonium groups
US4754021A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 21, 1985 |
| Grant date | Jun 28, 1988 |
| Priority date | — |
| Expiry date | Aug 21, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B56/16
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Methine-azo compounds of the formulae ##STR1## in which A is the complement to a heterocyclic 5- or 6-membered ring which has a quaternized N atom as a ring member, which can contain further hetero atoms and which can be substituted and/or be fused with carbocyclic or heterocyclic rings, PA0 R is hydrogen, cyano or C.sub.2 -C.sub.3 -alkylene which is bonded to an N atom of ring A to form a 5- or 6-membered ring, PA0 B is substituted or unsubstituted phenylene or naphthylene, PA0 m and n independently of each other are the numbers 1 or 2, in the formula (I) at least one of the two symbols m and n being the number 2 and where in the case m=2 the two B's are identical or different, PA0 KK is the radical of a coupling component PA0 X.sup..crclbar. is an anion and Y is a bridge member. These compounds can be used for dyeing and printing in particular polyacrylonitrile, acid-modified polyester and especially paper.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.