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公开(公告)号：US20240425687A1
公开(公告)日：2024-12-26
申请号：US18698528
申请日：2022-10-05
Applicant: BOREALIS AG
Inventor： Susanne NILSSON , Joy Jie CHENG , Floran Régis PRADES , Antonios GITSAS
Abstract: The invention provides a cable, preferably a power cable, comprising one or more conductors surrounded by at least one layer, preferably an insulation layer, wherein said layer comprises a polymer composition comprising: (i) at least 75 wt % of an ethylene based plastomer; and (ii) 0.2 to 10 wt % of an amine filler, oxide filler or mixture thereof; and wherein said polymer composition has a dielectric loss expressed as tan δ (50 Hz) of 200×10−4 or less, when measured at 500 V/mm and 90° C. as described in the description part under “Determination methods”.
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公开(公告)号：US20210147660A1
公开(公告)日：2021-05-20
申请号：US17056855
申请日：2019-05-30
Applicant: BOREALIS AG
Inventor： Anh Tuan TRAN , Alexandra Romina ALBUNIA , Joy Jie CHENG , Joseph THORMAN , John JAMIESON , Ravindra TUPE
IPC: C08L23/06 , C08F210/02 , C08F210/08 , C08F2/00 , C08F2/34 , B29C45/00 , B29C43/00
Abstract: The invention provides a process for the preparation of a multimodal high density polyethylene (HDPE) having a melt flow rate (MFR2) of 0.1 to 4.0 g/10 min, said process comprising: (i) polymerising ethylene in a first polymerisation stage in the presence of a Ziegler-Natta catalyst to prepare a first ethylene homopolymer having a MFR2 from 10 to 500 g/10 min; (ii) polymerising ethylene in a second polymerisation stage in the presence of said catalyst and said first ethylene homopolymer to prepare an ethylene homopolymer mixture comprising said first ethylene homopolymer and a second ethylene homopolymer, said mixture having a MFR2 from 50 to 1000 g/10 min; and (iii) polymerising ethylene and at least one alpha-olefin comonomer in a third polymerisation stage in the presence of said catalyst and said ethylene homopolymer mixture to prepare said multimodal HDPE.
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