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    PROCESS FOR POLYMERIZING ALPHA-OLEFINES
    11.
    发明专利
    PROCESS FOR POLYMERIZING ALPHA-OLEFINES 未知

    公开(公告)号：IN140716B

    公开(公告)日：1976-12-11

    申请号：IN1180CA1974

    申请日：1974-05-29

    Applicant: HOECHST AG

    Inventor： ENGELMANN M

    IPC: C08F4/00 ,  C08F4/60 ,  C08F10/00 ,  C08F3/20

    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.

    14.
    发明专利
    未知

    公开(公告)号：BR8105079A

    公开(公告)日：1982-04-20

    申请号：BR8105079

    申请日：1981-09-06

    Applicant: HOECHST AG

    Inventor： KLIPPERT H ,  ENGELMANN M ,  PASCHALIS S ,  TZSCHOPPE E ,  WEINLICH J

    IPC: C08F14/00 ,  B01J19/18 ,  C08F2/00 ,  C08F2/18 ,  C08F2/20 ,  C08F14/06 ,  C08F291/00

    Abstract: In the manufacture of polymer suspensions, good spacetime yields, a narrow particle size distribution and good polymer properties are obtained in a relatively uncomplicated apparatus which includes a plurality of reactors having a length/diameter ratio of at least 4, the first reactor standing vertically and the others approximately horizontally. Plug flow of the polymerization mixture is maintained in the reaction zones provided by the reactors. In the first such zone, up to 10% of the polymerization is carried out, with agitation, preferably at a stirring energy per unit volume of 0.1 to 5 kWm-3. Wall encrustation is substantially prevented, particularly in the second reaction zone, through the use of smooth, non-metallic surfaces in the zone.

    17.
    发明专利
    未知

    公开(公告)号：DK147475A

    公开(公告)日：1975-10-09

    申请号：DK147475

    申请日：1975-04-07

    Applicant: HOECHST AG

    Inventor： STRAMETZ H ,  LEUGERING H J ,  RUST K ,  ENGELMANN M

    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 ,  C08L

    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.

    POLYPROPYLENE MOLDING COMPOSITION AND PROCESS FOR ITS PREPARATION
    20.
    发明专利
    POLYPROPYLENE MOLDING COMPOSITION AND PROCESS FOR ITS PREPARATION 未知

    公开(公告)号：IN140973B

    公开(公告)日：1977-01-08

    申请号：IN666CA1975

    申请日：1975-04-02

    Applicant: HOECHST AG

    Inventor： STRAMETZ H ,  LEUGERING H ,  RUST K ,  ENGELMANN M

    IPC: C08F2/00 ,  C08L23/00 ,  C08F2/14 ,  C08F297/00 ,  C08F297/08 ,  C08L7/00 ,  C08L21/00 ,  C08L23/06 ,  C08L23/08 ,  C08L23/10 ,  C08L23/12 ,  C08L23/16 ,  C08L101/00 ,  C08F29/02

    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.

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