Crosslinkable thermotropic polyesters derived from allylically substituted hydroxybenzoic acid and a process for preparing a shaped article of the polyesters

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-oxybenzo...

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Bibliographic Details
Main Authors RASOUL; HUSAM A. A, STACKMAN; ROBERT W
Format Patent
LanguageEnglish
Published 02.12.1986
Edition4
Subjects
CHEMISTRY
COMPOSITIONS BASED THEREON
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
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Summary: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.
Bibliography:Application Number: US19850775278