公开(公告)号：US20190292283A1

公开(公告)日：2019-09-26

申请号：US16306296

申请日：2017-05-29

Applicant: BOREALIS AG

Inventor： Yi LIU ,  Victor SUMERIN ,  Ravindra TUPE

IPC: C08F210/16 ,  C08F4/655 ,  C08F4/649 ,  C08F4/659 ,  C08L23/08

Abstract: A polyethylene composition comprising a base resin is disclosed herein. The base resin includes an ethylene homo- or copolymer fraction (A1), and an ethylene homo- or copolymer fraction (A2). Fraction (A1) has a lower weight average molecular weight than fraction (A2). The base resin has a melt flow rate MFR21 of equal to or less than 8.0 g/10 min and a density of 930 to 950 kg/m3. The polyethylene composition has a melt flow rate MFR5 of 0.01 to 0.3 g/10 min, a flow rate ratio FRR21/5 of equal to or more than 20 and a ratio of the weight average molecular weight and the number average molecular weight (Mw/Mn) of equal to or less than 30. Also the polyethylene composition has a tensile modulus of less than 1000 MPa. Also a process for the production of a polyethylene composition comprising polyethylene base resin is disclosed herein.

公开(公告)号：US20160280821A1

公开(公告)日：2016-09-29

申请号：US15032999

申请日：2014-12-12

Applicant: BOREALIS AG

Inventor： Yi LIU ,  John JAMIESON ,  Ravindra TUPE ,  Jarmo KELA

IPC: C08F210/16 ,  C08J5/18 ,  C08L23/08

CPC classification number: C08F210/16 ,  C08F2/001 ,  C08J5/18 ,  C08J2323/08 ,  C08L23/0815 ,  C08L2205/025 ,  C08L2205/03 ,  C08F210/08 ,  C08F2500/07 ,  C08F2500/12 ,  C08F2500/26 ,  C08F2500/08 ,  C08F4/025 ,  C08F4/6492 ,  C08F4/6555

Abstract: The present invention is a process for producing copolymers of ethylene and alpha-olefins having from 4 to 10 carbon atoms in three polymerization stages 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 content of extractable material and can be extruded to films which can be used in food contact applications.

Abstract translation: 本发明是在三个聚合阶段中制备乙烯和具有4-10个碳原子的α-烯烃的共聚物的方法，其中在两个阶段中制备低分子量共聚物的乙烯和一种高分子量共聚物 阶段 所得共聚物的可萃取材料含量低，可以挤出成可用于食品接触应用的薄膜。