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    82.
    发明专利
    未知

    公开(公告)号：ES2104253T3

    公开(公告)日：1997-10-01

    申请号：ES94118091

    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).

    PREPARATION OF PROPYLENE/ETHYLENE POLYMERS OF THE TOUGHENED POLYPROPYLENE TYPE
    85.
    发明专利
    PREPARATION OF PROPYLENE/ETHYLENE POLYMERS OF THE TOUGHENED POLYPROPYLENE TYPE 未知

    公开(公告)号：CA1333828C

    公开(公告)日：1995-01-03

    申请号：CA607986

    申请日：1989-08-10

    Applicant: BASF AG

    Inventor： KERTH JUERGEN ,  WERNER RAINER A ,  ZOLK RALF ,  RUEMPLER KLAUS-DIETER ,  SCHWEIER GUENTHER ,  MUELLER-MALL RUDOLF ,  GRUBER WOLFGANG

    IPC: C08F2/34 ,  C08F4/02 ,  C08F4/58 ,  C08F4/60 ,  C08F4/64 ,  C08F4/642 ,  C08F297/08

    Abstract: Propylene/ethylene block copolymers are prepared by a continuous process in which, in each case in an agitated fixed bed of finely divided polymer from the gas phase, first (I) in a first polymerization zone, propylene is homopolymerized by feeding in a Ziegler-Natta catalyst system consisting of (1) a titanium component which contains titanium, magnesium, chlorine and a phthalic acid derivative, (2) an aluminumalkyl component and (3) a silane component, and (II) in a second polymerization zone, a mixture of propylene and ethylene is polymerized with the propylene homopolymer present in the reaction mixture obtained in the first polymerization zone by feeding in the said reaction mixture. In the process, (A) a titanium component (1) is used which is obtained by a method in which (1.1) first, (1.1.1) in a liquid hydrocarbon, (1.1.2) a finely divided magnesium halide, (1.1.3) an alkanol, (1.1.4) a certain phthalic acid derivative and (1.1.5) titanium tetrachloride are reacted with one another under certain conditions, (1.2) the solid intermediate obtained from (1.1) is extracted with titanium tetrachloride or a liquid alkylbenzene until the remaining solid substance has become substantially richer in magnesium, and (1.3) finally, the solid substance remaining in (1.2) is washed with an alkane in a certain manner, (B) a specific silane is used as (3), and (C) specifically selected polymerization parameters are employed, with relationships between the first and second polymerization zones.

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