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:
Aug. 03, 1982
Filed:
Oct. 03, 1980
William L Schall, Grand Island, NY (US);
Hooker Chemicals & Plastics Corp., Niagara Falls, NY (US);
Abstract
The present invention relates to production of vinyl halide-polyolefin graft copolymers by a liquid phase bulk polymerization process wherein the process is carried out in the presence of a diluent. Suitable diluents preferably have vaporization pressure characteristics, within 100 psi., and similar liquid state viscosity, as vinyl halide monomer. The diluents are soluble in vinyl halide monomer under reaction conditions and are inert to the polymerization mass. The diluents are straight or branched chain, or cyclic saturated hydrocarbons having from about 3 to about 15 carbon atoms and, more preferably, from about 4 to about 8 carbon atoms. Particularly useful diluents are n-propane, n-butane, isobutane or mixtures thereof. The diluents are utilized in amounts from about 0.2 to less than about 50.0 percent based upon the total weight of the reaction charge.