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. 15, 1977
Filed:
May. 07, 1976
Philip L Kinson, Rexford, NY (US);
Charles M Orlando, Schenectady, NY (US);
General Electric Company, Schenectady, NY (US);
Abstract
Brominated biphenols are produced by a bromination process which comprises reacting bromine with a 3,3', 5,5'-tetrasubstituted diphenoquinone at a temperature below about +20.degree. C. in the presence of an inert diluent, evolving hydrogen bromide gas at a temperature of about +20.degree. C. or lower, heating the resulting reaction mixture at elevated temperatures to complete the bromination reaction and recovering the desired 2,2',6,6'-tetrabromo-3,3',5,5'-tetrasubstituted-4,4'-biphenol. The biphenol products of the process can be used as antioxidants, as monomeric starting materials for polymeric halogenated organic compounds which are fire retardant as well as monomeric flame retardant additives for polymeric compositions useful in molding, coating and insulating various articles of manufacture.