公开(公告)号：US20230074040A1

公开(公告)日：2023-03-09

申请号：US17788994

申请日：2021-03-22

Applicant: DENKA COMPANY LIMITED

Inventor： Hideharu MORI ,  Wataru NISHINO ,  Yushi KUMAGAI ,  Yutaka SAITO ,  Naoki KOBAYASHI

IPC: C08F293/00 ,  C08K5/06

Abstract: A chloroprene-based block copolymer, a latex, a latex composition, and a rubber composition that can produce a product with excellent tensile properties and flexibility without the use of a vulcanizing agent or a vulcanizing accelerator having a chloroprene-based block copolymer, contains 5 to 30% by mass of a polymer block (A) and 70 to 95% by mass of a chloroprene-based polymer block (B), wherein the polymer block (A) is derived from a monomer, when the monomer is polymerized alone, a polymer with a glass transition temperature of 80° C. or higher can be obtained and the chloroprene-based polymer block (B) includes a chloroprene monomer unit and a polyfunctional monomer unit.