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. 02, 1977
Filed:
Aug. 15, 1972
Toru Tomoshige, Ohtake, JA;
Mitsui Petrochemical Industries, Ltd., Tokyo, JA;
Abstract
A method of producing a modified waxy ethylene polymer, which comprises polymerizing ethylene in an inert hydrocarbon solvent at 120.degree. - 250.degree. C. and pressure ranging from the vapor pressure of the solvent at the polymerization temperature to 100 Kg/cm.sup.2 using a catalyst composed of a halogen compound of titanium and/or vanadium and an organoaluminum compound supported on a carrier comprising a hydrocarbon-insoluble magnesium-containing compound to form a waxy ethylene polymer having a viscosity average molecular weight of 500 to 30000, reacting an unsaturated polycarboxylic acid with the resulting waxy ethylene polymer in the presence of a peroxide at a temperature above the melting point of the waxy ethylene polymer and up to 250.degree. C., and if desired, contacting the ethylene polymer, before or after the reaction with the unsaturated polycarboxylic acid, with oxygen or a gas containing oxygen.