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    PROPYLENE-ETHYLENE BLOCK COPOLYMERS
    11.
    发明专利
    PROPYLENE-ETHYLENE BLOCK COPOLYMERS 未知

    公开(公告)号：AU550078B2

    公开(公告)日：1986-02-27

    申请号：AU9020382

    申请日：1982-11-05

    Applicant: BASF AG

    Inventor： JAGGARD JAMES F R ,  SCHWEIER GUENTHER ,  KLAERNER PETER

    IPC: C08F297/08 ,  C08F2/00 ,  C08F4/64

    Abstract: Propylene/ethylene block copolymers are prepared by a process in which, in an agitated bed comprising small polymer particles, first (I) propylene is homopolymerized from the gas phase, in a first polymerization zone, by feeding in a Ziegler-Natta catalyst comprising (1) a titanium(III) component and (2) a dialkyl-aluminum chloride component, with or without (3) a further catalyst component, and then (II) the product obtained in the first polymerization zone is fed into a second polymerization zone, where a mixture of propylene and ethylene is polymerized with the propylene homopolymer present in this product. In this process, the Ziegler-Natta catalyst employed contains a titanium(III) component (1) which is prepared by subjecting (1.1) a titanium-containing compound (a) of the formula TiCl3. nAlCl3 and (1.2) an electron donor (b), consisting of (b1) an ester of a particular class or (b2) a phosphorus-containing compound of a particular class, to a special milling procedure, the particular features of which are special metering and temperature conditions, suspending the resulting intermediate in a mixture of a liquid hydrocarbon (c) and an oxygen-containing compound (d), comprising (d1) an ether of a certain class and/or (d2) an ester of a certain class, and then heating the suspension obtained. The solid remaining in suspension is the titanium(III) component (1) which is to be employed for the polymerization. The polymer obtained has improved morphological properties.

    TITANIUM CONTAINING CATALYSTS
    13.
    发明专利
    TITANIUM CONTAINING CATALYSTS 未知

    公开(公告)号：AU540057B2

    公开(公告)日：1984-11-01

    申请号：AU3926678

    申请日：1978-08-25

    Applicant: BASF AG

    Inventor： MUELLER-TAMM HEINZ ,  JAGGARD JAMES F R ,  SCHICK HANS

    IPC: C08F4/00 ,  C07F7/00 ,  C08F4/60 ,  C08F4/64 ,  C08F10/00 ,  C08F110/06

    Abstract: A process for the manufacture of a titanium-containing component of a catalyst for the Ziegler-Natta polymerization of alpha -monoolefins, by (a) milling a titanium-containing compound of the general formula TiCl3.nAlCl3 (where n is a number from 0.01 to 1) with (b) an ether of a particular type or an ester of a particular type, wherein (1) a vibratory ball mill giving a relatively high milling acceleration is used, (2) the mill is first charged with the titanium-containing compound (a), after which it may or may not be run for a certain period, thereafter (3) while milling, the amount of the ether or ester (b) which corresponds to a particular molar ratio of aluminum in the titanium-containing compound (a) to ether or ester (b) is added continuously or in small portions, then (4) the batch is milled for a certain period, after which (5) the product obtained from stage (4) may or may not be washed with a hydrocarbon and dried, and following which (6) the product obtained from stage (4) or (5) may or may not be milled for a certain period at a low temperature, next (7) the product obtained from stage (4), (5) or (6) is brought together with a liquid silicon compound of a particular type or a liquid tin compound of a particular type (these compounds acting as promoters) and the batch is left for a certain period and is then separated into a solid-phase product and into a liquid-phase product, and thereafter (8) the solid-phase product obtained from stage (7) is washed with a hydrocarbon or with one of the promoters mentioned under (7) and is dried, following which (9) the product obtained from stage (8) may or may not be milled for a certain period at a low temperature. Using the titanium-containing catalyst components thus obtainable makes it possible to produce polymers, having a high stereoregularity, in high specific yields.

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