Bis-(benzimidazolone-azo-acetoacetylamino)-phenylene pigments
US3956266A · kind A · utility
15Cited by
2References
1Claims
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Key dates
| Filing date | Oct 21, 1974 |
| Grant date | May 11, 1976 |
| Priority date | — |
| Expiry date | Oct 21, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31971
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
New diazo pigments of the formula ##EQU1## wherein A denotes a phenylene or naphthylene radical and R denotes an aromatic radical containing a --CONH-- group bonded in a cyclic structure are prepared. The pigments are useful for coloring high-molecular organic materials such as polyamides, polyurethanes or polyesters. The pigments have good fastness to light, migration and weathering.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.