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22 条记录 (耗时 0.021 秒)

    Gas phase polymerization process
    11.
    发明授权
    Gas phase polymerization process 有权

    公开(公告)号：US09790290B2

    公开(公告)日：2017-10-17

    申请号：US15110669

    申请日：2015-02-27

    申请人： BOREALIS AG

    发明人： Vasileios Kanellopoulos ,  Apostolos Krallis ,  Mohammad Al-Haj Ali ,  Ravindra Tupe

    IPC分类号： C08F2/00 ,  C08F210/00 ,  C08F2/34 ,  C08F2/01

    CPC分类号： C08F2/34 ,  C08F2/01 ,  C08F110/02

    摘要： An olefin polymerization process comprising polymerizing olefins in gas phase in a fluidized bed in the presence of an olefin polymerization catalyst in a polymerization reactor having a vertical body; a generally conical downwards tapering bottom zone; a generally cylindrical middle zone having a height to diameter ratio L/D of at least 4, above and connected to said bottom zone; and a generally conical upwards tapering top zone above and connected to said middle zone wherein (i) fluidization gas is introduced to the bottom zone of the reactor from where it passes upwards through the reactor; (ii) the fluidization gas is withdrawn from the top zone of the reactor, filtered, compressed, cooled and returned into the bottom zone of the reactor; (iii) a fluidized bed is formed within the reactor where the growing polymer particles are suspended in the upwards rising gas stream; and (iv) there is no fluidization grid in the reactor; characterized in that the gas velocity is maintained in the reactor such that NBr is within the range of from 2.5 to 7.

    Polymer composition and a process for production of the polymer composition
    13.
    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.

    IMPROVED ADHESIVE POLYMER COMPOSITION
    14.
    发明申请
    IMPROVED ADHESIVE POLYMER COMPOSITION 审中-公开

    公开(公告)号：US20200040235A1

    公开(公告)日：2020-02-06

    申请号：US16494885

    申请日：2018-05-24

    申请人： Borealis AG

    发明人： Tua Sundholm ,  Juha Hartikainen ,  Jouni Purmonen ,  Ravindra Tupe ,  Juha Kuosa ,  Liubov Nikiforova

    IPC分类号： C09J151/06 ,  B32B7/12 ,  C08L23/16 ,  C08L23/08

    摘要： An adhesive polymer composition comprising a non-elastomeric copolymer of ethylene and one or more comonomers having 3 to 10 carbon atoms, and an elastomer is disclosed herein. The non-elastomeric copolymer is present in an amount of 60 to 95% by weight, based on the adhesive polymer composition, has a weight average molecular weight Mw of from 50 000 to 80 000 g/mol, molecular weight distribution Mw/Mn of 2.0 to 5.5, density of from 0.925 to 0.945 g/cm3, and at most 0.1 vinyl groups/1000 carbon atoms. The non-elastomeric copolymer or the non-elastomeric copolymer and the elastomer have been grafted with an acid rafting agent.

    GAS PHASE POLYMERIZATION PROCESS
    16.
    发明申请
    GAS PHASE POLYMERIZATION PROCESS 有权
    气相聚合方法

    公开(公告)号：US20160355613A1

    公开(公告)日：2016-12-08

    申请号：US15110669

    申请日：2015-02-27

    申请人： BOREALIS AG

    发明人： Vasileios Kanellopoulos ,  Apostolos Krallis ,  Mohammad Al-Haj Ali ,  Ravindra Tupe

    IPC分类号： C08F2/34 ,  C08F2/01

    CPC分类号： C08F2/34 ,  C08F2/01 ,  C08F110/02

    摘要： An olefin polymerization process comprising polymerizing olefins in gas phase in a fluidized bed in the presence of an olefin polymerization catalyst in a polymerization reactor having a vertical body; a generally conical downwards tapering bottom zone; a generally cylindrical middle zone having a height to diameter ratio L/D of at least 4, above and connected to said bottom zone; and a generally conical upwards tapering top zone above and connected to said middle zone wherein (i) fluidization gas is introduced to the bottom zone of the reactor from where it passes upwards through the reactor; (ii) the fluidization gas is withdrawn from the top zone of the reactor, filtered, compressed, cooled and returned into the bottom zone of the reactor; (iii) a fluidized bed is formed within the reactor where the growing polymer particles are suspended in the upwards rising gas stream; and (iv) there is no fluidization grid in the reactor; characterized in that the gas velocity is maintained in the reactor such that NBr is within the range of from 2.5 to 7.

    摘要翻译： 一种烯烃聚合方法，包括在具有垂直体的聚合反应器中，在烯烃聚合催化剂存在下，在流化床中气相聚合烯烃; 大致圆锥形的向下锥形底部区域; 大致圆柱形的中间区域，其高度与直径之比L / D至少为4，高于并连接到所述底部区域; 以及在所述中间区域上方并连接到所述中间区域的大致锥形的向上锥形顶部区域，其中（i）流化气体被引导到反应器的底部区域，从该区域向上通过反应器; （ii）流化气体从反应器的顶部区域排出，过滤，压缩，冷却并返回到反应器的底部区域; （iii）在反应器内形成流化床，其中生长的聚合物颗粒悬浮在向上升的气流中; 和（iv）反应器中不存在流化栅; 其特征在于，气体速度保持在反应器中，使得NBr在2.5至7的范围内。

    Process for producing LLDPE resins
    19.
    发明授权
    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.

    Process for polymerising ultra-high molecular weight polyethylene
    20.
    发明授权
    Process for polymerising ultra-high molecular weight polyethylene 有权

    公开(公告)号：US10308737B2

    公开(公告)日：2019-06-04

    申请号：US15515907

    申请日：2015-09-29

    申请人： BOREALIS AG

    发明人： Ravindra Tupe ,  Pernilla Fagerstolt

    IPC分类号： C08F110/02

    摘要： The present invention deals with a process for polymerizing ethylene in the presence of an olefin polymerization catalyst comprising titanium, magnesium and halogen in at least one polymerization stage where ethylene is polymerized in slurry, the process comprising treating the polymerization catalyst in a pre-treatment step by polymerizing an olefin on the polymerization catalyst so that the ratio of the weight of the olefin polymer to the weight of the original solid catalyst component is from 0.1 to 10 g/g and using the pre-treated catalyst in the production of ultra-high molecular weight polyethylene.