公开(公告)号：US20190389994A1

公开(公告)日：2019-12-26

申请号：US16481752

申请日：2018-03-29

Applicant: DENKA COMPANY LIMITED

Inventor： Wataru NISHINO ,  Yuhei ISHIGAKI ,  Takashi AIZAWA ,  Shogo HAGIWARA ,  Uichiro YAMAGISHI

IPC: C08F293/00 ,  C09J153/02

Abstract: To provide a block copolymer that includes an aromatic vinyl compound polymer and a chloroprene polymer, has a number average molecular weight of 100,000 or more, is preferred for a rubber composition and an adhesive composition, and is suitable for industrial production. A block copolymer includes at least one aromatic vinyl compound polymer block and at least one chloroprene polymer block, has a functional group with a structure represented by Chemical Formula (1) or (2), and has a number average molecular weight of 100,000 or more. The chloroprene polymer block has a number average molecular weight of 80,000 or more in total. (In Chemical Formula (1), R1 is hydrogen, chlorine, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heterocyclyl group)