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:
Sep. 13, 1977
Filed:
Feb. 11, 1975
Gordon W Calundann, North Plainfield, NJ (US);
Edward J Powers, Gillette, NJ (US);
Celanese Corporation, New York, NY (US);
Abstract
A route is provided for the formation of a polybenzimidazole solid material having an enhanced resistance to undergo the usual color darkening upon exposure to light. A minor concentration of a finely divided pigment found capable of stabilizing the background color inherently manifest by the polybenzimidazole polymer is dispersed in a solution of the polybenzimidazole, and the solvent is removed to produce a polybenzimidazole solid having the pigment substantially uniformly distributed therein. The pigment utilized may be arsenic thioarsenate, copper phthalocyanine, anatase titanium dioxide, or mixtures thereof. Fibers, films, three-dimensional shaped articles, etc. may be formed from the color stabilized polybenzimidazole.