Thermotropic liquid-crystalline aromatic copolymers
US5155204A · kind A · utility
4Cited by
1References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 26, 1991 |
| Grant date | Oct 13, 1992 |
| Priority date | — |
| Expiry date | Aug 26, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G69/44
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Liquid-crystalline, completely aromatic copolyesters are disclosed, which are endowed with a heat stability not lower than 350.degree. C., and are constituted by a succession of repetitive units containing: ##STR1## wherein A and B, which can be either equal to, or different, from, each other, can be either --O-- or --CO-- and one of the following moieties: ##STR2## in which Ar can be 1,4-phenylene, 2-monosubstituted-1,4-phenylene or 4,4'-diphenylene. Also copolyesters also containing amidic bonding groups are disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.