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:
Apr. 14, 1987
Filed:
Jan. 06, 1986
Junsuke Tanaka, Ikeda, JP;
Kenji Matsumoto, Okayama, JP;
Kuraray Co., Ltd., Kurashiki, JP;
Abstract
An improved process for continuously producing ethylene-vinyl acetate copolymer containing 20 to 50 mole % of ethylene is provided. An aliphatic alcohol solvent is employed in the polymerization vessel. Ethylene vapor discharged from the polymerization vessel is introduced into the tubes of the lower part of a multi-tubular heat exchanger. Vinyl acetate is introduced into the upper part of the heat exchanger and caused to flow through said tubes, thereby effecting absorption and solubilization of ethylene into the vinyl acetate. The solubilized ethylene and vinyl acetate is passed to the polymerization vessel. The process of this invention permits the stable production of the copolymer over a long period of time.