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:
May. 22, 1979
Filed:
Mar. 01, 1976
Akio Takahashi, Amherst, NY (US);
Geoffrey H Smith, North Tonawanda, NY (US);
George C Hopkins, Clarence, NY (US);
Hooker Chemicals & Plastics Corp., Niagara Falls, NY (US);
Abstract
Polyvinyl halide or polyvinyl halide graft copolymers intimately mixed with a polyester derived mainly from an halogenated bicycloheptene carboxylic acid or anhydride such as chlorendic acid or anhydride and an alkylene glycol or alkylene oxide such as ethylene glycol or ethylene oxide are provided. The graft copolymers of the invention are obtained by polymerizing a vinyl halide in bulk in contact with an olefin polymer. The graft copolymer compositions of the invention have good clarity and provide improved processing characteristics and increased impact strength without reduction in heat distortion resulting from the addition of the polyester. The improved impact strength polyvinyl halide compositions of the invention can include blends of the polyester of the invention with modifying compounds, such as alkyl methacrylate-butadiene/styrene graft polymer impact modifiers and halogenated polyvinyl chloride. Blends of vinyl halide polymers with the polyesters of the invention provide compositions having improved processability. A reduction in melt viscosity and fusion temperature can be obtained in the blends while maintaining or increasing heat distortion temperature. The compositions of the invention are useful in the production of molds made by extrusion, injection, blow, and sheet molding processes.