知搜-全球专利检索

  1. 登录
  2. 注册

搜索结果

28 条记录 (耗时 0.019 秒)

    Polyolefin Composition With Improved Resistance To High Temperature
    3.
    发明公开
    Polyolefin Composition With Improved Resistance To High Temperature 审中-公开

    公开(公告)号：US20230340240A1

    公开(公告)日：2023-10-26

    申请号：US18004987

    申请日：2021-07-07

    申请人： Borealis AG

    发明人： Andrey Buryak ,  Victor Sumerin ,  Anna Maria Hartl

    IPC分类号： C08L23/06 ,  F16L9/12

    CPC分类号： C08L23/06 ,  F16L9/12 ,  C08L2203/18 ,  C08L2314/02 ,  C08L2205/025

    摘要： The present invention relates to a polyethylene composition comprising a base resin which comprises a first ethylene homo- or copolymer fraction (A) having a melt flow rate MFR2 from 1 to 150 g/10 min, preferably from 5 to 100 g/10 min, and a second ethylene copolymer fraction (B) having a content of units derived from a comonomer from 0.30 to 1.00 mol %, preferably of from 0.40 to 0.85 mol % and more preferably of from 0.45 to 0.70 mol %, wherein fraction (A) has a lower molecular weight than fraction (B) and wherein fraction (B) is present in an amount of from 45 to 70 wt. %, preferably 47 to 67 wt. %, more preferably 49 to 65 wt. %, even more preferably 50 to 62 wt. % based on the total weight of the base resin; and wherein the polyethylene composition has a melt flow rate MFR5 from 0.10 to 0.35 g/10 min, preferably from 0.10 to 0.25 g/10 min and a strain hardening modulus from 50 to 150 MPa.

    Polymer composition and a process for production of the polymer composition
    4.
    发明授权
    Polymer composition and a process for production of the polymer composition 有权

    公开(公告)号：US10961334B2

    公开(公告)日：2021-03-30

    申请号：US16306296

    申请日：2017-05-29

    申请人： BOREALIS AG

    发明人： Yi Liu ,  Victor Sumerin ,  Ravindra Tupe

    IPC分类号： C08F210/16 ,  C08F4/649 ,  C08F4/655 ,  C08F4/659 ,  C08L23/08 ,  C08L23/04

    摘要： 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.

    POLYOLEFIN PIPE RESIN WITH VERY GOOD SAGGING AND SLOW CRACK GROWTH RESISTANCE
    5.
    发明公开
    POLYOLEFIN PIPE RESIN WITH VERY GOOD SAGGING AND SLOW CRACK GROWTH RESISTANCE 审中-公开

    公开(公告)号：US20230279206A1

    公开(公告)日：2023-09-07

    申请号：US18023931

    申请日：2021-10-25

    申请人： Borealis AG

    发明人： Qizheng Dou ,  Victor Sumerin ,  Elena Pomakhina ,  Jari Äärilä

    IPC分类号： C08L23/08 ,  C08F10/02 ,  B29C48/00 ,  B29C48/09

    CPC分类号： C08L23/0815 ,  B29C48/022 ,  B29C48/09 ,  C08F10/02 ,  B29K2023/08 ,  C08L2314/02

    摘要： The invention relates to a polyethylene (PE) composition comprising a base resin which comprises (A) a first ethylene homo- or copolymer fraction, wherein fraction (A) has melt flow rate, MFR2, from 100 to 600 g/10 min; and (B) a second ethylene-1-hexene copolymer fraction, wherein fraction (A) has a lower molecular weight than fraction (B) and wherein fraction (B) is present in an amount of from 50.0 to 58.0 wt.% based on the total weight of the base resin; wherein the base resin has a content of units derived from 1-hexene from 0.44 to 0.79 mol% based on the total amount of base resin; wherein the base resin has a molecular weight distribution, being the ratio of Mw/Mn, from 32 to 40 and the base resin has a Z average molecular weight, Mz, of more than 1,500 kg/mol; wherein the polyethylene composition has a melt flow rate MFR5 from 0.10 to 0.25 g/10 min; and a melt flow rate ratio, FRR21/5, from 30 to 42; and wherein the polyethylene composition has a critical temperature, Tc, in the rapid crack propagation test of -10° C. or lower and not less than -25° C. The invention also relates to a PE composition obtainable by a multistage process, an article comprising a PE composition, a pipe and use of a PE composition comprising a base resin for producing an article.

    (CO)POLYMERIZATION OF ETHYLENE
    6.
    发明申请
    (CO)POLYMERIZATION OF ETHYLENE 有权

    公开(公告)号：US20230117202A1

    公开(公告)日：2023-04-20

    申请号：US17914080

    申请日：2021-04-09

    申请人： Borealis AG

    发明人： Victor Sumerin ,  Markku Vahteri

    IPC分类号： C08F110/02 ,  C08L23/08 ,  C08F2/00 ,  C08F4/651 ,  C08F4/654

    摘要： The present application relates to a process for producing ethylene polymer in a polymerization process comprising polymerisation of ethylene, optionally with comonomers selected from C3-C20-alpha-olefins, preferably selected from C4-C10-alpha-olefins, in the presence of a Ziegler-Natta catalyst under polymerisation conditions in at least one polymerisation stage carried out in a solution, slurry or gas-phase reactor or in combinations thereof, wherein the Ziegler-Natta catalyst comprises (A) a solid Ziegler-Natta catalyst component and (B) a cocatalyst, wherein the solid Ziegler-Natta catalyst component (A) comprises a solid support of a Mg compound, a transition metal of Group 4 to 6 and an internal electron donor.

    ZIEGLER-NATTA CATALYSTS FOR OLEFIN POLYMERIZATION
    7.
    发明申请
    ZIEGLER-NATTA CATALYSTS FOR OLEFIN POLYMERIZATION 有权

    公开(公告)号：US20220380496A1

    公开(公告)日：2022-12-01

    申请号：US17764235

    申请日：2020-10-01

    申请人： Borealis AG

    发明人： Victor Sumerin ,  Georgy Kipiani

    IPC分类号： C08F210/16 ,  C07C43/10 ,  C07D307/12 ,  C07D307/42

    摘要： The present invention relates to optionally substituted 1,3-dimethoxypropanes and 3-methoxypropylamines, and more particularly to their use as internal donors in Ziegler-Natta catalysts to obtain polymers with desirable properties. The present disclosure further concerns Ziegler-Natta catalyst components comprising said optionally substituted 1,3-dimethoxypropanes and 3-methoxypropylamines, and Ziegler-Natta catalysts for olefin polymerization comprising said Ziegler-Natta catalyst components, as well as a method for preparing the same and their use in providing polyolefins.

    CABLE JACKET COMPOSITION
    9.
    发明申请
    CABLE JACKET COMPOSITION 有权

    公开(公告)号：US20210095108A1

    公开(公告)日：2021-04-01

    申请号：US16499352

    申请日：2018-04-06

    申请人： Borealis AG

    发明人： Anna Hjärtfors ,  Yi Liu ,  Joseph Thorman ,  Victor Sumerin

    IPC分类号： C08L23/08 ,  C08F210/16 ,  G02B6/44 ,  H01B3/44

    摘要： The present invention relates to a cable jacket composition comprising a multimodal olefin copolymer, said copolymer having density of 0.935-0.960 g/cm3 and MFR2 of 2.2-10.0 g/10 min and said composition having ESCR of at least 2000 hours and a cable shrinkage of 0.70% or lower. The invention further relates to the process for preparing said composition and its use as outer jacket layer for a cable, preferably a communication cable, most preferably a fiber optic cable.