Thermotropic liquid-crystalline aromatic polyesters of substituted 4,4'-dihydroxy-diphenylene
US4923955A · kind A · utility
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10Claims
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Key dates
| Filing date | Nov 21, 1988 |
| Grant date | May 8, 1990 |
| Priority date | — |
| Expiry date | Nov 21, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K19/3809
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Thermotropic liquid-crystalline aromatic polyesters of 4,4'-dihydroxy-diphenyl substituted with a halogen or with an alkyl, cycloalkyl, aryl, aralkyl, keto or ether radical.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.