Crosslinkable thermotropic polyesters derived from allylically substituted hydroxybenzoic acid and a process for preparing a shaped article of the polyesters
US4626584A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 11, 1985 |
| Grant date | Dec 2, 1986 |
| Priority date | — |
| Expiry date | Sep 11, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/605
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A novel polyester is provided which is capable of forming an anisotropic melt and which, subsequent to being formed into shaped articles, is capable of crosslinking to render the article highly heat stable. The polyester preferably consists of approximately 1 to 40 mole percent of 3-allyl-4-oxybenzoyl and/or 3-methylallyl-4-oxybenzoyl moieties copolymerized with oxyaroyl moieties and/or dioxaryl and dicarboxyaryl moieties. The process comprises heating a monomer mixture of allylically substituted hydroxybenzoic acid and aromatic hydroxy acids and/or aromatic diols and diacids to prepare the polyester; melt processing the polyester to form a solid shaped article; and heating to substantially crosslink the allylic groups while substantially retaining the configuration of the solid shaped article.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.