Thermotropic liquid crystalline aromatic polyester from 3,3'-diphenyl-4,4'- d
US4978735A · kind A · utility
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10Claims
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Key dates
| Filing date | Sep 5, 1989 |
| Grant date | Dec 18, 1990 |
| Priority date | — |
| Expiry date | Sep 5, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/605
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Thermotropic liquid crystalline aromatic polyesters of 3,3'-diphenyl-4,4'-dihydroxydyphenyl containing units derived from mono-substituted hydroquinones in amounts over 10% by moles with respect to the total of the aromatic diols.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.