The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 02, 1986
Filed:
Sep. 11, 1985
Robert W Stackman, Racine, WI (US);
Husam A Rasoul, Racine, WI (US);
Celanese Corporation, New York, NY (US);
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.