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:
Jan. 08, 2013
Filed:
Oct. 07, 2010
Keisuke Fujimura, Osaka, JP;
Nobuaki Sato, Osaka, JP;
Satoshi Matsunuma, Osaka, JP;
Yasufumi Beniya, Osaka, JP;
Keisuke Fujimura, Osaka, JP;
Nobuaki Sato, Osaka, JP;
Satoshi Matsunuma, Osaka, JP;
Yasufumi Beniya, Osaka, JP;
The Nippon Synthetic Chemical Industry Co., Ltd., Osaka, JP;
Abstract
A process is provided for producing an ethylene/vinyl alcohol copolymer by which impurities such as catalyst residue and by-products and solvent are removed to a high degree. A high-quality, homogeneous product can be efficiently produced by including a washing step including: introducing a paste containing an ethylene/vinyl alcohol copolymer and an alcohol into a washing tank; applying a shear force to the paste to knead the paste while contacting the paste with washing water so that a surface of the paste is repeatedly displaced by an inner part thereof; and discharging the alcohol to an outside of the tank together with the washing water to obtain a water-containing ethylene/vinyl alcohol copolymer composition having a small alcohol content.