Articulated para-ordered aromatic heterocyclic polymers containing diphenoxybenzene structures
US4229566A · kind A · utility
34Cited by
6References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 24, 1979 |
| Grant date | Oct 21, 1980 |
| Priority date | — |
| Expiry date | Aug 24, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G73/22
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Para-ordered aromatic heterocyclic polymers characterized by having p-benzbisoxazole, p-benzbisthiozole or p-benzbisimidazole units and containing diphenoxybenzene structures. The diphenoxybenzene structures function as "swivels" in the polymer chains, imparting flexibility thereto and making it possible to cast strong films from solutions of the polymers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.