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:
Jul. 05, 2022
Filed:
Nov. 14, 2018
Tokushima University, Tokushima, JP;
Sekisui Chemical Co., Ltd., Osaka, JP;
Koichi Ute, Tokushima, JP;
Tomohiro Hirano, Tokushima, JP;
Miyuki Oshimura, Tokushima, JP;
Yasunari Kusaka, Osaka, JP;
Yohei Nishimura, Osaka, JP;
Misaki Senoo, Osaka, JP;
TOKUSHIMA UNIVERSITY, Tokushima, JP;
SEKISUI CHEMICAL CO., LTD., Osaka, JP;
Abstract
The present invention provides a vinyl alcohol-vinyl acetate copolymer having excellent solubility and capable of providing a film having high flexibility, high mechanical strength, and high adhesion, and a method for producing a vinyl alcohol-vinyl acetate copolymer. Provided is a vinyl alcohol-vinyl acetate copolymer including a unit of vinyl alcohol and a unit of vinyl acetate, the vinyl alcohol-vinyl acetate copolymer having a triad unit chain ratio Tof 7.5 or less, where the triad unit chain ratio Tis obtained using the following formula (1): wherein the VOH content ratio represents the amount of the unit of vinyl alcohol, the Vac content ratio represents the amount of the unit of vinyl acetate, the OOO proportion represents the proportion of a triad OOO, and the AOO proportion represents the proportion of a triad AOO.