Heterocyclic aromatic polymers of the polyimidazopyrrolone class, their prepolymers and their preparation
US4208505A · kind A · utility
2Cited by
1References
18Claims
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Key dates
| Filing date | Sep 9, 1977 |
| Grant date | Jun 17, 1980 |
| Priority date | — |
| Expiry date | Sep 9, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G73/18
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Long-chain polymeric polyimidazopyrrolones (also referred to as pyrrones) have macromolecular chains of the formula: ##STR1## where A is a tetravalent organic radical and n is a large whole number. The polymers have film-forming properties and can be used in the production of laminates or composite materials, for example, friction pads.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.