Bis(arylazo)diimides pigments
US4396545A · kind A · utility
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4References
46Claims
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Assignee
Inventors
Key dates
| Filing date | May 7, 1981 |
| Grant date | Aug 2, 1983 |
| Priority date | — |
| Expiry date | May 7, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31855
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The products of the invention are high melting, highly insoluble N,N'-bis(arylazo)diimides prepared by reacting 2 mols of an arylazoaromatic amine with pyromellitic acid dianhydride or 3,3',4,4'-benzophenone tetracarboxylic acid dianhydride. The products are colored and useful as pigments in surface coating compositions and plastics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.