Thermotropic liquid-crystalline aromatic coplymers
US5233013A · kind A · utility
2Cited by
0References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 24, 1992 |
| Grant date | Aug 3, 1993 |
| Priority date | — |
| Expiry date | Jul 24, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/605
- 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 repeatitive units containing: ##STR1## wherein A and B, which can be either equal to, or different, from, each other, can be either --0-- or 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.