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. 07, 1976
Filed:
Sep. 28, 1973
Pierre Malfroid, Brussels, BE;
Solvay & Cie, Brussels, BE;
Abstract
Super-halogenated unsaturated polyesters having average molecular weights of between 300 and 3,000, comprising units derived from at least one .alpha.-epihalohydrin and from maleic anhydride and optionally from another cyclic organic anhydride, possessing a halogen content arising from super-halogenation of between 1 and 35% by weight and the process for their manufacture which is characterized in that maleic anhydride, alone or mixed with another cyclic organic anhydride, is copolymerized with at least one .alpha.-epihalohydrin in molar ratios of epihalohydrin to anhydride(s) of between 1:1 and 2:1, in the presence of a titanium tetrahalide, the halogen being preferably chosen from the group consisting of chlorine and bromine.