Polyester resin exhibiting optical anisotropy in molten state which contains a low concentration of 6-oxy-2-naphthoyl units and composition thereof
US4920197A · kind A · utility
8Cited by
4References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 10, 1989 |
| Grant date | Apr 24, 1990 |
| Priority date | — |
| Expiry date | Apr 10, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/605
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A polyester is provided which exhibits an anisotropic melt phase and an advantageous combination of (1) melt processability and (2) excellent heat resistance in articles formed from the same. The polyester consists essentially of p-oxybenzoyl units, 6-oxy-2-naphthoyl units, terephthaloyl units, and metadioxyphenylene units in appropriate concentrations (as described. The aromatic rings of such units optionally may be substituted as discussed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.