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:
Nov. 16, 1982
Filed:
Oct. 02, 1981
Robert C Evers, Dayton, OH (US);
Abstract
Articulated p-benzobisoxazole and p-benzobisthiazole polymers which contain a limited number of 3,3'-biphenyl or 2,2'-bipyridyl segments are synthesized, with inherent viscosities as high as 14 dl/g being recorded. The 3,3'-biphenyl or 2,2'-bipyridyl segments in the p-benzobisoxazole and p-benzobisthiazole polymers impart flexibility to the polymers without adversely affecting the thermooxidative stability. While the resultant articulated polymers exhibit liquid crystalline behavior in methanesulfonic acid and form strong cast films from that solvent, they also exhibit thermooxidative stability comparable to other p-benzobisthiazole and p-benzobisoxazole polymers. The resultant films are useful for the fabrication of high strength laminates to be used in severe environment structural applications.