公开(公告)号：US20180072877A1

公开(公告)日：2018-03-15

申请号：US15559366

申请日：2016-03-17

Applicant: MITSUI CHEMICALS, INC.

Inventor： Kotaro ICHINO ,  Tomohiro YAMAGUCHI ,  Yukio AITA ,  Yuji NOGUCHI

IPC: C08L23/08 ,  C08J3/24 ,  C08F210/16

CPC classification number: C08L23/083 ,  C08F210/16 ,  C08F2810/20 ,  C08J3/24 ,  C08J2323/08 ,  C08J2423/12 ,  C08J2461/06 ,  C08L23/00 ,  C08L23/08 ,  C08L61/06 ,  C08L2205/025 ,  C08L2205/03 ,  C08L2207/04 ,  C08L2312/04 ,  C08L23/10

Abstract: [Problem] The purpose of the invention is to provide: a thermoplastic elastomer composition capable of providing molded articles that are lightweight, have better oil resistance than those provided by conventional cross-linked thermoplastic elastomers, and have hardness and mechanical properties such as tensile strength and tensile elongation that are equal to or superior to those provided by conventional cross-linked thermoplastic elastomers; and an ethylene/α-olefin/unconjugated polyene copolymer having little compression set at low temperature as well as flexibility and an excellent balance of rubber elasticity at low temperature and tensile strength at normal temperature.[Solution] Produced are: a thermoplastic elastomer composition obtained by dynamically crosslinking a mixture containing a crystalline olefin polymer (A), an ethylene/α-olefin (having 4-20 carbon atoms)/unconjugated polyene copolymer (1B) that satisfies specific requirements, and a phenol resin-based crosslinking agent (C); and an ethylene-α-olefin/unconjugated polyene copolymer (2B) that satisfies specific requirements.