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:
Mar. 28, 2023
Filed:
Dec. 23, 2020
Mitsui Chemicals, Inc., Tokyo, JP;
Koji Endo, Chiba, JP;
Mayumi Hiwara, Chiba, JP;
Sadahiko Matsuura, Iwakuni, JP;
Yusuke Mizobuchi, Ichihara, JP;
Yuichi Yamamura, Ichihara, JP;
Yuji Noguchi, Funabashi, JP;
Yuji Ishii, Kisarazu, JP;
Tatsuya Sakai, Ichihara, JP;
Keisuke Shishido, Ichihara, JP;
Kotaro Ichino, Ichihara, JP;
Kiyohide Inomata, Ichihara, JP;
Fumito Takeuchi, Chiba, JP;
Kenta Ide, Singapore, SG;
MITSUI CHEMICALS, INC., Tokyo, JP;
Abstract
The purpose of the present invention is to obtain an ethylene⋅α-olefin⋅non-conjugated polyene copolymer that has a low permanent compression set at low temperatures, is flexible, and has an excellent balance of rubber elasticity at low temperatures and tensile strength at normal temperatures. This ethylene-based polymer is an ethylene⋅α-olefin⋅non-conjugated polyene copolymer that includes units derived from ethylene (A), units derived from an α-olefin (B) containing 4-20 carbon atoms, and units derived from a non-conjugated polyene (C) and satisfies (1)-(4). (1) The molar ratio of (A) to (B) is 40/60-90/10, (2) the contained amount of the units derived from (C) is 0.1-6.0 mol %, (3) ML125° C. is 5-100, and (4) the B value is 1.20 or more.