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    51.
    发明专利
    未知

    公开(公告)号：BR9000588A

    公开(公告)日：1991-01-15

    申请号：BR9000588

    申请日：1990-02-09

    Applicant: BASF AG

    Inventor： KERTH JUERGEN ,  SCHWAGER HARALD ,  ZOLK RALF

    IPC: C08F2/34 ,  C08F10/00 ,  C08F210/06 ,  C08F297/08 ,  C08F210/02

    Abstract: A process for the preparation of propylene-ethylene copolymers in an agitated fixed bed in which propylene is polymerised from the gas phase, initially in a first polymerisation zone at a pressure of from 20 to 40 bar and at a temperature of from 60 to 90 DEG C with feed of a Ziegler-Natta catalyst system, and, in a second polymerisation zone, at a pressure of from 7 to 35 bar and a temperature of from 40 to 70 DEG C, a mixture of olefins is polymerised onto the finely divided polymer discharged from the first polymerisation zone, is characterised in that, in the second polymerisation zone, a mixture of propylene, ethylene and a further alpha -olefin having 4 to 10 carbon atoms is polymerised on at a ratio between the partial pressures of propylene and ethylene in the range of from 100 : 20 to 100 : 120 and at a ratio between the partial pressures of propylene and the alpha -olefin in the range from 100 : 1 to 100 : 20, the pressure in the second polymerisation zone is chosen to be at least 5 bar below the pressure in the first polymerisation zone, and the weight ratio between the monomers reacted in the first and second polymerisation zones is such that it is in a range between 100 : 10 and 100 : 50.

    58.
    发明专利
    未知

    公开(公告)号：ES2112543T3

    公开(公告)日：1998-04-01

    申请号：ES94916969

    申请日：1994-05-17

    Applicant: BASF AG

    Inventor： LANGHAUSER FRANZ ,  KERTH JUERGEN ,  MUELLER PATRIK ,  KERSTING MEINOLF ,  SCHWEIER GUENTHER

    IPC: C08F2/34 ,  C08F4/642 ,  C08F4/646 ,  C08F4/68 ,  C08F297/08

    Abstract: PCT No. PCT/EP94/01591 Sec. 371 Date Nov. 9, 1995 Sec. 102(e) Date Nov. 9, 1995 PCT Filed May 17, 1994 PCT Pub. No. WO94/28042 PCT Pub. Date Dec. 8, 1994Multiphase block copolymers of propylene comprising a) a polymer of propylene with from 0 to 5% by weight of further C2-C10 1-alkenes, b) a copolymer of propylene with from 5 to 98% by weight of further C2-C10 1-alkenes, the multiphase block copolymers having a melting point of less than 155 DEG C. and a stiffness (shear modulus G) conforming to the following condition (I): (I) where Ma) denotes the amount of propylene polymer a) and Mco denotes the amount of the multiphase block copolymer. are obtainable in particular by polymerization by means of metallocene-containing catalyst systems.\!

    59.
    发明专利
    未知

    公开(公告)号：DE59403550D1

    公开(公告)日：1997-09-04

    申请号：DE59403550

    申请日：1994-11-17

    Applicant: BASF AG

    Inventor： KERSTING MEINOLF ,  HUNGENBERG KLAUS-DIETER ,  KOELLE PETER ,  KERTH JUERGEN

    IPC: C08F4/642 ,  C08F4/649 ,  C08F4/655 ,  C08F4/658 ,  C08F10/00

    Abstract: Catalyst systems of the Ziegler-Natta type containing, as active constituents a) a titanium-containing solid component containing titanium, magnesium, halogen and a carboxylic ester (carboxylate) as electron-donor compound, and, as catalyst b) an aluminium compound and c) optionally a further electron-donor compound, where a compound of the formula I Rm1A1 - (OCOR )m2 (I> in which R and R are identical or different and are each a hydrogen radical or a C1-C8 alkyl radical and m1 and m2 are each the number 1 or 2 and they add up to the number 3, is used during preactivation of the titanium-containing component a) with the cocatalyst as aluminium compound b).

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