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    FOAMED POLYPROPYLENE
    1.
    发明授权
    FOAMED POLYPROPYLENE 有权
    发泡聚丙烯

    公开(公告)号：EP1159309B1

    公开(公告)日：2009-09-02

    申请号：EP99943501.9

    申请日：1999-06-18

    Applicant: BOREALIS A/S

    Inventor： BORVE, Kjetil, L. ,  ROMMETVEIT, Kari ,  HELLAND, Kristian

    IPC: C08F8/00 ,  C08L23/26 ,  C08J9/04 ,  B29C44/50

    CPC classification number: C08J9/04 ,  C08F8/00 ,  C08J2201/03 ,  C08J2323/26 ,  C08L23/10 ,  C08L23/26 ,  C08F10/06 ,  C08L2666/04

    Abstract: A process for the branching and foaming of a polypropylene resin, being performed continuously in an extruder, comprising: (i) mixing the polypropylene resin with a peroxide selected from the group comprising the structures represented by: R1-O-O-C(O)-C=C-C(O)-O-O-R2, R3-R5-O-C(O)-O-O-C(O)-O-R6-R4, wherein each R1 and R2 represents linear or branched alkyl groups having 1-15 carbon atoms, each R3 and R4 represents linear or branched alkyl groups having 4-30 carbon atoms, and each R5 and R6 represents cyclic or linear aliphatic groups having 6 carbon atoms, (ii) heating the constituents to a temperature higher than the melting temperature of the polypropylene resin and the decomposition temperature of the peroxide while being mixed and conveyed forward, (iii) keeping the polymer melt at said temperature for a period of 3 to 100 times the half-life of the peroxide at said temperature, (iv) introducing a foaming agent, optionally also a bubble initiator, into the polymer melt inside the extruder at a position where the branching is substantially complete, (v) extruding the processed polymer melt through an extrusion die into ambient atmosphere, whereupon the polymer composition expands. The obtained polymer resins may be used in manufacturing articles by pipe extrusion, thermoforming and blow molding. Branched polypropylene resins not being subjected to foaming may be used as such in manufacturing articles by injection molding, extrusion, thermoforming, blow molding, calandering and fibre spinning.

    METHOD OF PREPARING A MULTILAYER PIPE
    3.
    发明授权
    METHOD OF PREPARING A MULTILAYER PIPE 失效
    制造方法MULTI-LAYER管材管件

    公开(公告)号：EP0883769B1

    公开(公告)日：2003-05-02

    申请号：EP97906405.2

    申请日：1997-03-03

    Applicant: BOREALIS A/S

    Inventor： EK, Carl-Gustaf ,  MALM, Bo ,  NYMARK, Anders

    IPC: F16L9/133

    CPC classification number: F16L9/133 ,  F16L11/04 ,  F16L57/02 ,  Y10T428/1393 ,  Y10T428/31909 ,  Y10T428/31913 ,  Y10T428/31917 ,  Y10T428/31938

    Abstract: A multilayer pipe having improved resistance to rapid crack propagation is described. The pipe consists of at least two layers of different propylene plastic materials, which are so selected and combined that the pipe has a resistance to rapid crack propagation, measured as the critical temperature, which is equal to or lower than 0 DEG C. The pipe is made of polypropylene plastic, and at least one of the layers of the pipe comprises a polypropylene plastic, which is selected from a propylene containing from 1.0 to 10.0 % by weight of ethylene or C4-C10- alpha -olefin repeating units and having an MFR2 value of between 0.05 and 0.40 g/10 min or an elastomer-modified polypropylene containing from 1.0 to 30 % by weight of ethylene or C4-C10- alpha -olefin repeating units and having an MFR2 value of between 0.05 and 50 g/10 min.

    STABILIZING AGENT
    4.
    发明公开
    STABILIZING AGENT 有权
    稳定剂

    公开(公告)号：EP1155058A1

    公开(公告)日：2001-11-21

    申请号：EP99953808.5

    申请日：1999-10-13

    Applicant: Degussa AG ,  BOREALIS A/S

    Inventor： HJERTBERG, Thomas ,  KIRCHHOFF, Jochen ,  JEGELKA, Udo ,  GUSTAFSSON, Bill ,  LINNER, Johan ,  SMEDBERG, Annika

    IPC: C08F210/02 ,  C08F210/06 ,  C08L23/00

    CPC classification number: C08K5/3435 ,  C08F210/02 ,  C08L23/06 ,  C08L23/0892 ,  C08L2201/08 ,  C08L23/02 ,  C08L2666/04 ,  C08F220/34 ,  C08F2500/12

    Abstract: A stabilizing agent for polymer materials, such as polyethylene, and a polymer material containing it are disclosed. The stabilizing agent comprises a copolymer of ethylene or propylene (A) and a vinyl compound (B) with the formula (I), wherein X=O, NH or NR5; R1, R2 and R3 independently each = H, C1-C8 alkyl, C1-C8-alkenyl or C1-C8 substituted aryl; R4=H, C1-C8 alkyl, C6-C12 cycloalkyl, C1-C10 acyl, C1-C10 acyloxy or C1-C8 alkyl ether; R5=C1-C8 alkyl; the copolymer contains at least 1 mol% of (B); and the copolymer has an MFR2 of 1- 1000 g/10 min.

    Abstract translation: 公开了用于聚合物材料如聚乙烯的稳定剂和含有它的聚合物材料。 稳定剂包含乙烯或丙烯（A）与式（I）的乙烯基化合物（B）的共聚物，其中X = O，NH或NR 5; R 1，R 2和R 3各自独立地为H，C 1 -C 8烷基，C 1 -C 8链烯基或C 1 -C 8取代的芳基; R4 = H，C1-C8烷基，C6-C12环烷基，C1-C10酰基，C1-C10酰氧基或C1-C8烷基醚; R5 = C1-C8烷基; 该共聚物含有至少1摩尔％的（B）; 共聚物的MFR 2为1〜1000g / 10分钟。

    COLOURED POLYPROPYLENE COMPOSITIONS
    6.
    发明公开
    COLOURED POLYPROPYLENE COMPOSITIONS 有权
    有色聚丙烯组合

    公开(公告)号：EP1030878A1

    公开(公告)日：2000-08-30

    申请号：EP98967142.5

    申请日：1998-11-09

    Applicant: BOREALIS A/S

    Inventor： CROZIER, Hérve ,  FOLLAND, Rick

    IPC: C08K5/00 ,  C08L23/10

    CPC classification number: C08K5/0008 ,  C08K5/0083 ,  C08L23/10 ,  C08L23/20 ,  C08L2666/04

    Abstract: The present invention concerns coloured polymer compositions and a process for the preparation thereof. The present composition comprises a propylene polymer nucleated with a polymeric nucleating agent containing vinyl compound units and having an at least 7 °C higher crystallization temperature than that of the corresponding non-nucleated polymer, and a colour pigment having a nucleating effect on the propylene polymer. The shrinkage of the composition varies less than 5 % for different colour pigments.

    COMPOSITION FOR ELECTRIC CABLES
    8.
    发明公开
    COMPOSITION FOR ELECTRIC CABLES 审中-公开
    成分用于电缆

    公开(公告)号：EP1025568A1

    公开(公告)日：2000-08-09

    申请号：EP98951849.3

    申请日：1998-10-21

    Applicant: BOREALIS A/S

    Inventor： DAMMERT, Ruth ,  GUSTAFSSON, Bill ,  LIEBIG, Karin ,  SMEDBERG, Annika

    IPC: H01B3/44 ,  C08L23/04 ,  C08K5/3435

    CPC classification number: H01B3/441 ,  C08K5/34926 ,  C08L23/04

    Abstract: A peroxide-cross-linkable ethylene polymer composition for an insulating layer of an electric cable is described. The composition is characterised in that the additives of the composition comprise an N-substituted 2,2,6,6-tetramethylpiperidine compound as an antioxidant and light stabilising agent; and that the composition after 21 days at 135 °C has a retained ultimate tensile strength of at least 75 % and a retained ultimate elongation of at least 75 % when tested in accordance with IEC 811. This additive acts as a combined light and thermo-oxidative stabilising agent and inhibits the generation of moisture thereby reducing the risk of water tree formation. Preferably, the composition contains no conventional antioxidants, such as phenolic antioxidants, organic phosphite oxidants and sulphur containing anti-oxidants.

    ELECTRIC CABLE AND A METHOD AND COMPOSITION FOR THE PRODUCTION THEREOF
    9.
    发明公开
    ELECTRIC CABLE AND A METHOD AND COMPOSITION FOR THE PRODUCTION THEREOF 有权
    电力电缆及方法和组合物制作

    公开(公告)号：EP1025161A1

    公开(公告)日：2000-08-09

    申请号：EP98948027.2

    申请日：1998-10-05

    Applicant: BOREALIS A/S

    Inventor： GUSTAFSSON, Bill ,  FAGRELL, Ola

    IPC: C08L23/08 ,  H01B1/24

    CPC classification number: H01B1/24 ,  C08K3/04 ,  C08L23/08 ,  C08L23/0869 ,  Y10T428/2927 ,  Y10T428/294 ,  Y10T428/2947 ,  C08L2666/02

    Abstract: A semiconducting composition for the inner semiconducting layer of an electric cable, an electric cable incorporating the composition, and a method of producing a cross-linked inner semiconducting layer of an electric cable are disclosed. The semiconducting composition comprises, based on the total weight of the composition, (a) 30-90 % by weight of an ethylene copolymer, (b) carbon black in an amount at least sufficient to make the composition semiconducting, (c) 0-8 % by weight of a peroxide cross-linking agent, (d) 0-8 % by weight of conventional additives, characterised in that said ethylene copolymer (a) is an ethylene-methyl (meth)acrylate copolymer, preferably comrising 5-25 % by weight of methyl(meth)acrylate, based on the weight of the copolymer.

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