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:
Feb. 05, 2019
Filed:
Dec. 22, 2014
Applicant:
The Nippon Synthetic Chemical Industry Co., Ltd., Osaka, JP;
Inventors:
Yoshiharu Nagao, Osaka, JP;
Shuuichi Fukuyama, Osaka, JP;
Kouji Yamada, Osaka, JP;
Tomonori Yoshida, Osaka, JP;
Assignee:
THE NIPPON SYNTHETIC CHEMICAL INDUSTRY CO., LTD., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F 218/08 (2006.01); C08F 210/02 (2006.01); C08F 216/06 (2006.01); C08F 218/04 (2006.01); C08F 8/12 (2006.01); C08J 5/18 (2006.01);
U.S. Cl.
CPC ...
C08F 218/08 (2013.01); C08F 8/12 (2013.01); C08F 210/02 (2013.01); C08F 216/06 (2013.01); C08F 218/04 (2013.01); C08J 5/18 (2013.01); C08J 2329/04 (2013.01);
Abstract
The present invention provides a saponified ethylene-vinyl ester copolymer product from which a film having reduced fish eyes can be obtained and a method for producing an ethylene-vinyl ester copolymer that is a precursor thereof. At the time of producing the ethylene-vinyl ester copolymer, as a vinyl ester monomer, the oxygen concentration at storage and/or transportation is adjusted to from 2 to 8 ppm and the oxygen concentration at polymerization is adjusted to less than 2 ppm.