公开(公告)号：US20190144582A1

公开(公告)日：2019-05-16

申请号：US16301196

申请日：2017-05-29

Applicant: BOREALIS AG

Inventor： Anna Hjärtfors ,  Yi Liu ,  Ravindra Tupe ,  Victor Sumerin

IPC: C08F210/16 ,  C08K3/04 ,  H01B3/44

Abstract: The present invention relates to a multimodal ethylene copolymer composition having a density of 920 to 949 kg/m3 and a flexural modulus, wherein said flexural modulus is following the equation: Flexural modulus [MPa]

公开(公告)号：US09951213B2

公开(公告)日：2018-04-24

申请号：US15032939

申请日：2014-12-12

Applicant: BOREALIS AG

Inventor： Ravindra Tupe ,  Jani Aho ,  Markku Vahteri ,  Tuomas Noopila ,  Jarmo Kela

IPC: C08L23/08 ,  C08F210/16 ,  C08F4/02

CPC classification number: C08L23/0815 ,  C08F4/025 ,  C08F210/16 ,  C08L2205/025 ,  C08F210/08 ,  C08F2500/12 ,  C08F2500/26 ,  C08F2/001 ,  C08F4/6546 ,  C08F4/6565

Abstract: The present invention is a process for producing low density copolymers of ethylene and alpha-olefins having from 4 to 10 carbon atoms in three polymerization stages in the presence of an olefin polymerization catalyst where a low molecular weight copolymer of ethylene is produced in two of the stages and a high molecular weight copolymer in one of the stages. The resulting copolymers have a low density of not more than 920 kg/m3.