Melt processable thermotropic aromatic copolyester derived from hydroxy phenoxy benzoic acids and hydroxy benzoic acid
US4945150A · kind A · utility
1Cited by
2References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 4, 1989 |
| Grant date | Jul 31, 1990 |
| Priority date | — |
| Expiry date | May 4, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L67/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention relates to a class of copolyesters which display optical anisotropy in the molten state and to the shaped articles, fibers and films obtained from the optically anisotropic melts. the copolyesters comprise recurring structural units (a) independently each occurrence selected from the group consisting of Formulas I and II; and recurring structural units (b) independently each occurrence selected from the group consisting of Formula III; ##STR1## wherein R independently each occurrence is a chemically inert substituent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.