公开(公告)号：US20230279199A1

公开(公告)日：2023-09-07

申请号：US18017506

申请日：2021-07-23

Applicant: BOREALIS AG

Inventor： Konrad GEBAUER ,  Anna Maria HARTL ,  Jingbo WANG ,  Markus GAHLEITNER ,  Lionel DELAVIERE

IPC: C08K5/20 ,  C08K5/00 ,  C08K5/3417 ,  C08K3/34

CPC classification number: C08K5/20 ,  C08K5/0083 ,  C08K5/3417 ,  C08K3/34

Abstract: Polyethylene composition comprising a) at least 89.0 wt. % of a multimodal polyethylene polymer; b) optionally 0.01 to 10.0 wt.-% of a colour pigment or a colour masterbatch comprising a colour pigment; c) 0.01 to 1.0 wt.-% of a nucleating agent of formula (I) or a nucleating agent of formula (II) wherein A=mono- or bicyclic aryl group; each X is independently a —CO—NH— group or —NH—CO— group; R1 to R3 are each independently a C1-C20 alkyl optionally substituted by one or more hydroxyl groups; C2-C20 alkenyl optionally substituted by one or more hydroxyl groups; C2-C20 alkyl interrupted by oxygen or sulfur; C3-C12 cycloalkyl optionally substituted by one or more C1-C20 alkyl; C3-C12 cycloalkyl-C1-6-alkylene- wherein the C3-12 cyclokalkyl is optional substituted by one or more C1-C20 alkyl groups.

公开(公告)号：US20240279368A1

公开(公告)日：2024-08-22

申请号：US18569034

申请日：2022-06-10

Applicant: BOREALIS AG

Inventor： Felice DE SANTIS ,  Tuan Anh TRAN ,  Victor SUMERIN ,  Markku VAHTERI ,  Anna Maria HARTL

IPC: C08F10/02 ,  C08J5/18 ,  C08L23/08

CPC classification number: C08F10/02 ,  C08J5/18 ,  C08L23/0815 ,  C08J2323/06 ,  C08J2323/08 ,  C08J2423/06 ,  C08J2423/08 ,  C08L2205/025 ,  C08L2308/00 ,  C08L2314/02

Abstract: A process for producing a multimodal ethylene polymer comprising the steps of (i) polymerising ethylene in a first polymerisation step in the presence of a Ziegler-Natta polymerisation catalyst to produce a first ethylene homopolymer (PEI) having a melt flow rate MFR2 of from 100 to 300 g/10 min (ISO 1133-1 at 190° C. under 2.16 kg load); (ii) polymerising ethylene in a second polymerisation step in the presence of the first ethylene homopolymer to produce a first ethylene polymer mixture (PEM1) comprising the first ethylene homopolymer and a second ethylene homopolymer, said first ethylene polymer mixture having a melt flow rate MFR2 of from 200 to 1000 g/10 min, and wherein the MFR2 of the first ethylene homopolymer (PEI) is lower than the MFR2 of the first ethylene polymer mixture (PEM1); and (iii) copolymerising ethylene and at least one alpha-olefin comonomer in a third polymerisation step in the presence of the first ethylene polymer mixture to produce a second ethylene polymer mixture (PEM2) comprising the first ethylene polymer mixture and a third ethylene copolymer (PE3), said second ethylene polymer mixture having a density of from 937 to 950 kg/m3 (ISO 1183-2) and a melt flow rate MFR5 of from 0.1 to 5.0 g/10 min (ISO 1133-1 at 190° C. under 5 kg load).