Anthraquinone dyestuffs
US4225523A · kind A · utility
0Cited by
3References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 7, 1979 |
| Grant date | Sep 30, 1980 |
| Priority date | — |
| Expiry date | Aug 7, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B1/343
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Anthraquinone dyestuffs which in the free acid form are of the formula: ##STR1## where Z is H or SO.sub.3 H, PA1 R is H, C.sub.1-4 alkyl or hydroxy C.sub.1-4 alkyl, the ring A may optionally be additionally substituted by OCH.sub.3 and/or SO.sub.3 H. These dyes are especially valuable for application to cellulose and fixation by heating with a carbodiimide such as dicyandiamide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.