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    3.
    发明专利
    未知

    公开(公告)号：DE2417093A1

    公开(公告)日：1975-11-06

    申请号：DE2417093

    申请日：1974-04-08

    Applicant: HOECHST AG

    Inventor： STRAMETZ HELMUT DIPL CHEM DR ,  LEUERING HANS-JOACHIM DIPL CHE ,  RUST KURT DIPL CHEM DR ,  ENGELMANN MANFRED DIPL CHEM DR

    IPC: C08L23/00 ,  C08F2/00 ,  C08F2/14 ,  C08F297/00 ,  C08F297/08 ,  C08L7/00 ,  C08L21/00 ,  C08L23/06 ,  C08L23/08 ,  C08L23/10 ,  C08L23/12 ,  C08L23/16 ,  C08L101/00 ,  C08F210/16

    Abstract: 1508033 Polyolefin compositions HOECHST AG 7 April 1975 [8 April 1974] 14080/75 Headings C3P and C3M Moulding compositions comprising (1) 70 to 90 weight per cent of crystalline polypropylene, (2) 2 to 10 weight per cent of an ethylene/propylene copolymer and (3) 8 to 25 weight per cent of polyethylene wherein the melt flow index of the composition is less than that of the polypropylene component and greater by a factor of 1À3 to 7À0 than that of polypropylene prepared by means of the same catalyst as the moulding composition and having the same reduced specific viscosity, may be prepared by (a) preparing polypropylene of melt flow index 5 to 80 g./10 mins. by polymerizing propylene at 0À5 to 40 kg/cm. and 40 to 110‹ C. in the presence of a stereo specific catalyst and 0- 1 to 20% by volume, based on the propylene, of hydrogen, (b) introducing ethylene at a propylene partial pressure of less than 0À5 kg./ cm. and 40‹ to 110‹ C. and (c) preparing polyethylene in a third step at a propylene partial pressure of less than 0À001 kg./cm. and a total pressure of 0À5 to 40 kg./cm. and at 40‹ to 110‹ C. in the presence of 1 to 50% by volume of hydrogen. In examples the polymers are prepared by sequential polymerization in the presence of catalysts comprising titanium trichloride and diethyl aluminium chloride.

    4.
    发明专利
    未知

    公开(公告)号：DE3132421A1

    公开(公告)日：1983-02-24

    申请号：DE3132421

    申请日：1981-08-17

    Applicant: HOECHST AG

    Inventor： ENGELMANN MANFRED DIPL CHEM DR ,  KLIPPERT HEINZ DIPL CHEM DR ,  TZSCHOPPE EBERHARD DIPL ING

    IPC: C08F14/00 ,  C08F2/00 ,  C08F2/18 ,  C08F2/20 ,  C08F14/06 ,  C08F291/00

    Abstract: The process is described for the continuous suspension polymerization of vinyl chloride in aqueous phase, in which the polymerization mixture is subjected, in 2 zones, to treatment employing different process parameters in respect of final conversion, dwell time, number of theoretical cascade stages and stirrer power applied. This procedure gives, at good space-time yields, very uniform products which have a narrow particle size distribution, a high bulk density, good flow and a low speck count. In spite of using standard kettle material, only a very low formation of deposit on the kettle walls is observed.

    8.
    发明专利
    未知

    公开(公告)号：DE2329641A1

    公开(公告)日：1974-12-19

    申请号：DE2329641

    申请日：1973-06-09

    Applicant: HOECHST AG

    Inventor： ENGELMANN MANFRED DIPL CHEM DR

    IPC: C08F4/00 ,  C08F4/60 ,  C08F10/00 ,  C08F3/02

    Abstract: Essentially amorphous polyolefines of medium molecular weight are prepared by polymerization of alpha -olefines in the presence of a Ziegler supported catalyst. This catalyst consists of the reaction product of the chloride and/or alcoholates of the tetravalent titanium and of an alcoholate and/or a magnesium compound containing hydroxyl groups and of an aluminiumorganic compound containing chlorine, in which the proportion Al : Cl is 4:1 to 0.8:1. The polymerization is carried out at a temperature of from 100 DEG to 160 DEG C.

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