Monoazo pigments derived from substituted aminothiophenes
US4263205A · kind A · utility
1Cited by
9References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 31, 1979 |
| Grant date | Apr 21, 1981 |
| Priority date | — |
| Expiry date | May 31, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B29/20
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Monoazo pigments of the formula I ##STR1## in which R is the radical of a carbocyclic or heterocyclic aromatic amine and R.sub.1, R.sub.2 and R.sub.3 are hydrogen, halogen, alkyl, alkoxy, alkoxycarbonyl, substituted or unsubstituted aminocarbonyl, nitro, cyano or trifluoromethyl. These pigments are suitable for coloring high molecular weight organic material and are distinguished by their easy accessibility and good general fastness properties and in particular by high clarity of color shade.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.