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:
Nov. 08, 2022
Filed:
Oct. 24, 2018
Applicant:
Unimatec Co., Ltd., Tokyo, JP;
Inventors:
Daichi Toge, Ibaraki, JP;
Daiki Watanabe, Ibaraki, JP;
Assignee:
UNIMATEC CO., LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F 220/18 (2006.01); C08F 220/14 (2006.01); C08L 33/14 (2006.01); C08F 220/28 (2006.01); C09K 3/10 (2006.01);
U.S. Cl.
CPC ...
C08L 33/14 (2013.01); C08F 220/1808 (2020.02); C08F 220/281 (2020.02); C08F 220/282 (2020.02); C09K 3/10 (2013.01); C08F 2810/20 (2013.01); C09K 2200/0625 (2013.01); C09K 2200/0642 (2013.01);
Abstract
An acrylic rubber contains a copolymer of a monomer mixture of: 25 to 46 wt. % of alkoxyalkyl acrylate, 23 to 37 wt. % of 2-ethylhexyl acrylate, 9 to 17 wt. % of alkyl methacrylate, 1 to 3 wt. % of monoalkyl fumarate and the remaining amount is ethyl acrylate. This acrylic rubber improves hydrolysis resistance by introducing a specific alkyl acrylic monomer with extremely low hydrolysis property i.e. low hydrophilicity, and at the same time satisfies all of oil resistance, cold resistance, and hydrolysis resistance in a well-balanced manner.