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:
Aug. 02, 2022
Filed:
Mar. 06, 2018
Applicant:
The Nippon Synthetic Chemical Industry Co., Ltd., Osaka, JP;
Inventors:
Assignee:
MITSUBISHI CHEMICAL CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F 8/16 (2006.01); C08F 216/06 (2006.01); C08F 8/12 (2006.01); B32B 27/28 (2006.01); C08F 210/02 (2006.01);
U.S. Cl.
CPC ...
C08F 8/16 (2013.01); B32B 27/28 (2013.01); C08F 8/12 (2013.01); C08F 210/02 (2013.01); C08F 216/06 (2013.01); C08F 2800/10 (2013.01); C08F 2810/40 (2013.01);
Abstract
An ethylene-vinyl alcohol copolymer has an ethylene content of 20 to 60 mol % and includes a carboxylic acid group and a lactone ring group present at terminals thereof, wherein the molar concentration (Y/Z) of a lactone ring molar content (Y) to a sum (Z) of a carboxylic acid molar content (X) and the lactone ring molar content (Y) is not less than 58 mol %. The ethylene-vinyl alcohol copolymer is excellent in high-temperature thermal stability substantially without thermal decomposition, and is free from odor emanation and coloration even if being processed at a higher temperature.