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1. 发明授权

US10619036B2 Multimodal polyethylene copolymer 有权
公开(公告)号：US10619036B2
公开(公告)日：2020-04-14
申请号：US15580749
申请日：2016-05-30
申请人： BOREALIS AG
发明人： Ravindra Tupe , John Jamieson , Jarmo Kela , Alexandra Romina Albunia , Ricardo Godoy-Lopez , Markku Vahteri
IPC分类号： C08L23/08 , C08J5/18 , B32B27/08 , C08F210/16 , B32B27/32
CPC分类号： C08L23/0815 , B32B27/08 , B32B27/32 , B32B27/327 , C08F210/16 , C08J5/18 , B32B2250/242 , B32B2270/00 , B32B2307/516 , B32B2307/518 , B32B2307/558 , B32B2307/732 , B32B2439/46 , B32B2439/70 , B32B2553/00 , C08J2323/08 , C08J2423/08 , C08L2203/16 , C08L2205/025 , C08L23/0815 , C08L23/0815 , C08F210/16 , C08F210/14 , C08F210/08 , C08F2500/08 , C08F2500/12 , C08F210/16 , C08F210/08 , C08F2500/07 , C08F2500/12 , C08F210/16 , C08F2/001 , C08F210/16 , C08F4/6555 , C08F210/16 , C08F4/025
摘要： The present invention is directed to a multimodal polyethylene copolymer comprising a first and a second copolymer of ethylene and at least two alpha-olefin comonomers. The multimodal polyethylene copolymer is highly suitable for the production of films providing high impact strength in the sense of high Dart drop impact strength (DDI) and low extractables. The invention further presents final articles such as films made therefrom.

2. 发明授权

US09783661B2 Blend of bimodal polyethylene with unimodal ultra high molecular weight polyethylene with improved mechanical properties 有权
公开(公告)号：US09783661B2
公开(公告)日：2017-10-10
申请号：US14912571
申请日：2015-02-06
申请人： Borealis AG
发明人： Qizheng Dou , Alexandra Romina Albunia , Yi Liu
IPC分类号： C08L23/06 , C08L23/04 , C08J3/00
CPC分类号： C08L23/06 , C08J3/005 , C08J2323/06 , C08J2423/06 , C08J2423/08 , C08L23/04 , C08L2203/18 , C08L2205/02 , C08L2205/025 , C08L2207/068 , C08L23/0815
摘要： High density polyethylene blend, comprising (A) 55 to 99 wt % of a high density multimodal polyethylene component having a density of at least 930 kg/m3, and (B) 1 to 45 wt % of an ultra-high molecular weight polyethylene homo- or copolymer component having (i) an intrinsic viscosity of at least 15.0 dl/g (ii) an a nominal viscosity molecular weight (Mv) of at least 2.0*106 g/mol and (iii) a molecular weight of (Mw) of at least 0.7*106 g/mol, and wherein said blend has an MFR21 of 0.05 to 10.0 g/10 min and a density of at least 925 kg/m3.

3. 发明授权

US11572461B2 Multimodal copolymer of ethylene and at least two alpha-olefin comonomers and final articles made thereof 有权
公开(公告)号：US11572461B2
公开(公告)日：2023-02-07
申请号：US15579377
申请日：2016-05-30
申请人： BOREALIS AG
发明人： Ravindra Tupe , John Jamieson , Jarmo Kela , Alexandra Romina Albunia , Ricardo Godoy-Lopez , Markku Vahteri
IPC分类号： C08L23/08 , C08J5/18 , C08F210/16 , B32B27/32 , B32B27/08 , C08F2/00
摘要： The present invention is directed to a multimodal polyethylene copolymer comprising a first and a second copolymer of ethylene and at least two alpha-olefin comonomers. Such multimodal copolymers are highly suitable for conversion processes that require a high Draw Down Ratio, like the production of thin films. Such multimodal polyethylene copolymers provide a good impact strength in the sense of a high Dart drop impact strength (DDI) and good isotropy of the films produces thereof. The invention further presents final articles such as films made therefrom.

4. 发明授权

US10584196B2 Process for producing LLDPE resins 有权
公开(公告)号：US10584196B2
公开(公告)日：2020-03-10
申请号：US15739649
申请日：2016-06-23
申请人： BOREALIS AG
发明人： Alexandra Romina Albunia , Ravindra Tupe , Victor Sumerin , John Jamieson , Jani Aho , Markku Vahteri , Jarmo Kela , Renate Eckmayr
IPC分类号： C08F210/16 , C08F110/02 , C08F2/00 , C08F2/14 , C08F2/34 , C08F4/02 , C08L23/08 , C08L23/06
摘要： A process for producing copolymers of ethylene and at least one alpha-olefin having from 4 to 10 carbon atoms in the presence of a solid Ziegler-Natta catalyst comprising of magnesium, titanium, halogen and an internal organic compound, the copolymer having a density of from 906 to 937 kg/m3 and a melt flow rate MFR21 measured at 190° C. under 21.6 kg load of from 3 to 150 g/10 min. The process includes the steps of (A) homopolymerising ethylene or copolymerising ethylene and a first alpha-olefin having from 4 to 10 carbon atoms in a first polymerisation stage in the presence of the polymerisation catalyst, hydrogen and optionally the first alpha-olefin; (B) copolymerising ethylene and a second alpha-olefin having from 4 to 10 carbon atoms in a second polymerisation stage in the presence of the first homo- or copolymer of ethylene and the Ziegler-Natta catalyst; and (C) recovering the polymer mixture.

5. 发明授权

US10669410B2 Process for producing multimodal polyethylene in-situ blends including ultra-high molecular weight fractions 审中-公开
$Process for producing multimodal polyethylene in-situ blends including ultra-high molecular weight fractions$
公开(公告)号：US10669410B2
公开(公告)日：2020-06-02
申请号：US15539130
申请日：2015-12-21
申请人： BOREALIS AG
发明人： Yi Liu , Qizheng Dou , Alexandra Romina Albunia
IPC分类号： C08L23/08 , C08L23/06 , C08F10/02 , B29B9/12 , C08F2/00 , B29B9/06
摘要： The present application relates to a process for producing a multimodal polyethylene composition comprising the steps of polymerizing a polyethylene fraction (A-1) having a weight average molecular weight Mw of equal to or more than 500 kg/mol to equal to or less than 10,000 kg/mol and a density of equal to or more than 915 kg/m3 to equal to or less than 960 kg/m3 in one reaction step and polymerizing a polyethylene fraction (A-2) having a lower weight average molecular weight Mw as polyethylene fraction (A-1) and a density of equal to or more than 910 kg/m3 to equal to or less than 975 kg/m3 in a second reaction step of a sequential multistage process wherein one of said polyethylene fractions is polymerized in the presence of the other of said polyethylene fractions to form a first polyethylene resin (A) having a weight average molecular weight Mw of equal to or more than 150 kg/mol to equal to or less than 1,500 kg/mol, and a density of equal to or more than 910 kg/m3 to equal to or less than 975 kg/m3, wherein the weight average molecular weight Mw of the first polyethylene resin (A) is lower than the weight average molecular weight Mw of the polyethylene fraction (A-1), blending the first polyethylene resin (A) with a second polyethylene resin (B) having a weight average molecular weight Mw of equal to or more than 50 kg/mol to less than 500 kg/mol, and a density of equal to or more than 910 kg/m3 to equal to or less than 970 kg/m3 to form said multimodal polyethylene composition, wherein the multimodal polyethylene composition a melt flow rate MFR5 (190° C., 5 kg) of 0.01 to 10 g/10 min and a density of equal to or more than 910 kg/m3 to equal to or less than 970 kg/m3 a polyethylene composition obtainable by said process and the polyethylene resin of said first polymerization step.

6. 发明授权

US09708479B2 Multistage process for producing polyethylene compositions 有权
公开(公告)号：US09708479B2
公开(公告)日：2017-07-18
申请号：US14901948
申请日：2014-09-24
申请人： BOREALIS AG
发明人： Thomas Hjertberg , Ravindra Tupe , Udo Wahner , Tanja Piel , Yi Liu , Alexandra Romina Albunia , Floran Prades , Joseph Thorman , Dusan Jeremic
IPC分类号： C08L23/08 , C08F2/00
CPC分类号： C08L23/0815 , C08F2/001 , C08L2205/02 , C08L2205/03 , C08F210/16 , C08F210/14 , C08F2500/07 , C08F2500/12
摘要： A process for polymerizing ethylene in the presence of a polymerization catalyst by copolymerizing ethylene with a comonomer selected from the group of C4-C10 alpha-olefins in three polymerization stages. The polymers produced in the three stages have different melt flow rates. The polymer composition produced by the process has good mechanical properties and can be used for making pipes. The process has a good productivity and provides a stable and economic operation.

7. 发明授权

US09676877B2 Disentangled high or ultrahigh molecular weight polyethylene prepared with Ziegler-Natta catalyst 有权
公开(公告)号：US09676877B2
公开(公告)日：2017-06-13
申请号：US15021113
申请日：2015-02-06
申请人： Borealis AG
发明人： Thomas Hjertberg , Alexandra Romina Albunia , Yi Liu , Qizheng Dou
IPC分类号： C08F10/00 , C08F10/02 , C08L23/06
CPC分类号： C08F10/02 , C08L23/06 , C08L2203/18 , C08L2205/025 , C08L2207/062 , C08L2207/068 , C08L2314/02 , C08F4/6555 , C08F4/025 , C08F110/02 , C08F2500/17 , C08F2500/01 , C08F210/16 , C08F210/14
摘要： Disentangled high or ultrahigh molecular weight polyethylene ((U)HMWPE) being produced with a Ziegler-Natta catalyst, characterized by (i) a factor for the normalized elastic modulus G′0/G′P of less than 0.95 determined in a dynamic time sweep measurement at 180° C. with constant strain of 0.5% at fixed frequency of 10 rad/s for at least 3600 s, whereby G′0 is the elastic shear modulus measured at t0 directly after melting the sample and G′p is the maximum plateau modulus.

8. 发明授权

US12012504B2 Process for the preparation of multimodal high density polyethylene 有权
公开(公告)号：US12012504B2
公开(公告)日：2024-06-18
申请号：US17056855
申请日：2019-05-30
申请人： BOREALIS AG
发明人： Anh Tuan Tran , Alexandra Romina Albunia , Joy Jie Cheng , Joseph Thorman , John Jamieson , Ravindra Tupe
IPC分类号： C08F210/16 , B29C43/00 , B29C45/00 , C08F2/00 , C08F2/34 , C08F210/02 , C08F210/08 , C08L23/06 , C08L23/16 , B29L31/56
CPC分类号： C08L23/06 , B29C43/003 , B29C45/0001 , C08F2/001 , C08F2/34 , C08F210/02 , C08F210/08 , C08F210/16 , B29L2031/56 , C08F2500/12 , C08F2500/17 , C08L2203/10 , C08L2203/30 , C08L2205/025 , C08L2205/03 , C08L2207/062 , C08L2314/02
摘要： 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.

9. 发明申请

US20220010046A1 POLYETHYLENE COMPOSITION FOR HIGH PRESSURE RESISTANT PIPES 有权
公开(公告)号：US20220010046A1
公开(公告)日：2022-01-13
申请号：US17288804
申请日：2019-10-23
申请人： BOREALIS AG
发明人： Yi Liu , Qizheng Dou , Victor Sumerin , Markku Vahteri , Thomas Hjertberg , Girish Suresh Gali , Alexandra Romina Albunia
IPC分类号： C08F210/16 , C08F2/00 , C08L23/08
摘要： The present invention relates to a polyethylene composition comprising a base resin having a density of from 950.0 kg/m3 to 962.0 kg/m3, determined according to ISO 1183, wherein the polyethylene composition has a melt flow rate MFR21 (190° C., 21.16 kg), of from 1.0 to 9.0 g/10 min, determined according to ISO 1133 and a viscosity at a constant shear stress of 747 Pa eta747 of from 3500 kPa #s to 20000 kPa #s, a polyethylene composition obtainable by a multi-stage process, a process for producing said polyethylene composition, an article, such as a pipe or pipe fitting, comprising said polyethylene composition and the use of said polyethylene composition for the production of an article, such as a pipe or pipe fitting.

10. 发明授权

US09920190B2 Multimodal polyethylene composition with high pressure resistance 有权
公开(公告)号：US09920190B2
公开(公告)日：2018-03-20
申请号：US15323915
申请日：2015-07-06
申请人： BOREALIS AG
发明人： Yi Liu , Alexandra Romina Albunia , Tanja Piel , Qizheng Dou , Hermann Prokschi
IPC分类号： C08L23/06 , C08F110/02 , B29C47/88 , B29C47/00 , B29K23/00 , B29L23/00
CPC分类号： C08L23/06 , B29C47/0004 , B29C47/0023 , B29C47/882 , B29K2023/065 , B29K2023/0683 , B29L2023/22 , C08F110/02 , C08F2500/05 , C08F2500/07 , C08F2500/11 , C08F2500/17 , C08L23/0815 , C08L2203/18 , C08L2205/025 , C08L2207/068 , C08L2207/07 , C08L2308/00
摘要： The present invention relates to a multimodal polyethylene composition which can be manufactured into pipes showing improved pressure resistance comprising a high density multimodal ethylene polymer component (A) having a density of at least 930 kg/m3, and a MFR21 of not more than 15 g/10 min, wherein said composition exhibits a LAOS-NLF defined as L ⁢ ⁢ A ⁢ ⁢ O ⁢ ⁢ S - N ⁢ ⁢ L ⁢ ⁢ F =  G 1 ′ G 3 ′  where G1′—first order Fourier Coefficient G3′—third order Fourier Coefficient of at least 1.7. Such a polyethylene composition is useful for the manufacture of pressure pipes that exhibit improved pressure resistance and creep resistance and do not undergo sagging. Further disclosed is a process for the production of a pipe using such a multimodal polyethylene composition and a pipe comprising such a multimodal polyethylene composition.

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