Methine dyestuffs containing a phenyl azo group
US4201707A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 26, 1978 |
| Grant date | May 6, 1980 |
| Priority date | — |
| Expiry date | Jun 26, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B26/04
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Dyestuffs of the formula ##STR1## wherein R.sub.1 denotes halogen, alkyl, cycloalkyl, aralkyl, nitro, cyano, acyl, acylamino, amino, aminocarbonyl, aminosulphonyl, alkylsulphonyl, arylsulphonyl, alkoxy, aryloxy, aralkoxy, carboxyl, alkoxycarbonyl, aryloxycarbonyl or aralkoxycarbonyl or arylazo, PA1 R.sub.2 denotes alkyl, alkenyl, cycloalkyl, aryl or aralkyl, PA1 R.sub.3 and R.sub.4 denote alkyl, cycloalkyl or aralkyl, PA1 R.sub.5, R.sub.6, R.sub.7 and R.sub.8 denote hydrogen, alkyl, cycloalkyl, aralkyl or aryl, and wherein PA1 R.sub.6 and R.sub.7 can together form a fused cycloaliphatic ring, PA1 A denotes aryl or heteryl, PA1 n denotes 0, 1 or 2 and PA1 An.sup.(-) denotes an anion, process for their preparation and their use for dyeing and printing especially polyacrylonitrile and acid modified polyamides and polyesters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.