公开(公告)号：EP4435026A1

公开(公告)日：2024-09-25

申请号：EP22896030.8

申请日：2022-11-15

申请人： Korea Petrochemical Ind. Co., Ltd

发明人： KIM, Younghwan ,  KANG, Kapku ,  KIM, Hyecheol ,  KIM, Dongjun ,  KIM, Sanggon ,  SON, Hojin ,  HA, Hyun Soo

IPC分类号： C08F297/08 ,  H01M50/417 ,  H01M50/494 ,  C08F293/00 ,  C08F4/659 ,  C08F4/646

CPC分类号： Y02P20/52 ,  Y02E60/10 ,  C08F4/646 ,  C08F4/659 ,  C08F293/00 ,  C08F297/08 ,  H01M50/417 ,  H01M50/494

摘要： The present invention relates to an (ultra)high molecular weight polyethylene-based block copolymer having (ultra)high molecular weight polyethylene as a first-stage polymer in a linear structure through multi-stage polymerization and having a viscosity average molecular weight of 400,000 to 5,000,000 g/mol under the conditions that hydrogen (H2) as a molecular weight regulator is added in a trace amount or not added, a producing method therefor, and a secondary battery separator produced using the same as a raw material. The present invention provides improved kneading property, film surface and other properties compared to a heterogeneous composite secondary battery separator made of polyethylene and polypropylene processed by simple blending.