Rigid-rod benzobisazole polymer containing cyclic phosphate ester
US5200495A · kind A · utility
1Cited by
6References
8Claims
0Family size
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Key dates
| Filing date | May 22, 1992 |
| Grant date | Apr 6, 1993 |
| Priority date | — |
| Expiry date | May 22, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G75/32
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Rigid-rod aromatic heterocyclic polymers having repeating units of the formula: ##STR1## wherein Ba is a benzobisazole moiety of the formula: ##STR2## wherein X is --O--, --S-- or --NH.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.