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. 19, 1992
Filed:
Mar. 13, 1991
Mitsui Petrochemical Industries, Ltd., Tokyo, JP;
Abstract
Disclosed herein is a process for the production of cycloolefin random copolymers comprising copolymerizing ethylene with at least one specific cyclooloefin in a liquid phase in the presence of a catalyst and a solvent in a polymerization vessel, wherein ethylene is copolymerized with the cycloolefin while feeding the cycloolefin or a mixture of the cycloolefin and the solvent onto inside circumferential wall of the polymerization vessel above the gas-liquid interface in the polymerization vessel. The proposed process ensures a smooth copolymerization reaction and a continuous and stable running of the apparatus for a prolonged period of time, and is productive of ethylene-cycloolefin random copolymers which have a uniform quaility and are excellent in heat resistance, heat aging property and various mechanical properties.