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    71.
    发明专利
    未知

    公开(公告)号：DE3775312D1

    公开(公告)日：1992-01-30

    申请号：DE3775312

    申请日：1987-09-15

    Applicant: BASF AG

    Inventor： KERTH JUERGEN ,  MUELLER-MALL RUDOLF ,  SCHWEIER GUENTHER

    IPC: C08F4/60 ,  C08F4/64 ,  C08F10/02

    Abstract: Finely-divided homopolymers or copolymers of C2H4 with minor amts. of 3-6C alpha-monoalkene are produced by polymerisation at 30-150 deg.C and 1-200 bar, using a Ziegler catalyst system. This consists of: (1) a catalyst component contg. Ti, which is (1.1) a ppte. prepd. by adding (1.1.1) a 0.1-10M TiCl4 soln. in a liquid 5-10C satd. aliphatic and/or aromatic hydrocarbon (I), (1.1.2) a 0.1-10M soln. of an organo-Al cpd. (II) of the formula RnAlCl3-n (n = 1.5-3; R = 1-12C alkyl) in (I) and (1.1.3) a 2-8C alpha-monoalkene (III) to an organic liquid (IV) and stirring vigorously to form a ppte.; and (2) a catalyst component contg. Al, which is a tri-1-12C-alkyl-Al, such that the atomic ratio of Ti in (1) to Al in (2) = 1:1-1:200. Pptn. is carried out at -30 to +30 deg.C in (IV) having a viscosity of 1.5-30 mm2/s at the pptn. temp., which consists of (I) and a relatively small amt. of dissolved 2-6C alpha-monoalkene polymer; the amts. used are 2-20 l (I), a total of 0.505 mole (II) and a total of 5-500 mole (III) per mole TiCl4; the rate of pptn. is 0.002-0.15 mole/min. and the rate of addn. of (IV) 0.02-1 mole/min. per mole total TiCl4 used; and the ppte. from (1.1) in (IV) is mixed well with a 0.1-10M soln. of an organo-Li cpd. of the formula LiR (R = 1-12C alkyl) in (I) in an amt. of 0.1-20 mole LiR/mole Ti for 0.5-12 hrs. at -10 to +60 deg.C and the resultant solid phase prod. is used as Ti-contg. component (1).

    PREPARATION OF PROPYLENE-ETHYLENE COPOLYMERS
    73.
    发明专利
    PREPARATION OF PROPYLENE-ETHYLENE COPOLYMERS 未知

    公开(公告)号：ZA90967B

    公开(公告)日：1991-10-30

    申请号：ZA90967

    申请日：1990-02-09

    Applicant: BASF AG

    Inventor： KERTH JUERGEN ,  JUERGEN KERTH ,  SCHWAGER HARALD ,  HARALD SCHWAGER ,  ZOLK RALF ,  RALF ZOLK

    IPC: C08F2/34 ,  C08F10/00 ,  C08F210/06 ,  C08F297/08 ,  C08F

    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.

    74.
    发明专利
    未知

    公开(公告)号：BR9100187A

    公开(公告)日：1991-10-22

    申请号：BR9100187

    申请日：1991-01-16

    Applicant: BASF AG

    Inventor： SCHWAGER HARALD ,  KERTH JUERGEN ,  ZOLK RALF ,  KOELLE PETER ,  WERNER RAINER ALEXANDER

    IPC: C08F4/655 ,  C08F4/60 ,  C08F297/02 ,  C08F297/08 ,  C08F210/06 ,  C08F4/642

    Abstract: Propylene-ethylene copolymers obtainable by two-step polymerisation from the gas phase in an agitated fixed bed by means of a Ziegler-Natta catalyst system containing an aluminium compound as cocatalyst in addition to a titanium-containing solid component, in which, in a first polymerisation step, propylene is polymerised at a pressure of from 20 to 40 bar, a temperature of from 60 to 90 DEG C and a mean residence time of the reaction mixture of from 1 to 5 hours, giving from 0.05 to 2 kg of polypropylene per mmol of the aluminium compound, and subsequently, in a second polymerisation step, a mixture of propylene and ethylene is polymerised onto the polymer discharged from the first polymerisation step, at a pressure of from 5 to 30 bar, this pressure being at least 7 bar below the pressure in the first polymerisation step, a temperature of from 30 to 100 DEG C and a mean residence time of the reaction mixture of from 1 to 5 hours, the ratio between the partial pressures of propylene and ethylene being set in the range from 0.5 : 1 to 5 : 1, and a) the weight ratio between the monomers reacted in the first and second polymerisation steps is set so that it is in the range from 2.5 : 1 to 20 : 1, or b) the polymerisation in the second polymerisation step is carried out in the presence of a C1-C8 alkanol, the weight ratio between the monomers reacted in the first and the second polymerisation steps being from 1 : 1 to 20 : 1. s

    76.
    发明专利
    未知

    公开(公告)号：DE59608211D1

    公开(公告)日：2001-12-20

    申请号：DE59608211

    申请日：1996-07-01

    Applicant: BASF AG

    Inventor： FISCHER DAVID ,  LANGHAUSER FRANZ ,  STUERMER RAINER ,  KERTH JUERGEN ,  SCHWEIER GUENTHER ,  BRINTZINGER HANS-HERBERT ,  SCHMIDT KATRIN

    IPC: C07F17/00

    Abstract: PCT No. PCT/EP96/02869 Sec. 371 Date Jan. 8, 1998 Sec. 102(e) Date Jan. 8, 1998 PCT Filed Jan. 7, 1996 PCT Pub. No. WO97/03081 PCT Pub. Date Jan. 30, 1997In a process for converting the achiral meso form or the racemate of an ansa-metallocene complex or a mixture thereof into one of its enantiomers, the conversion is carried out photochemically in the presence of an enantiomerically pure auxiliary reagent.

    77.
    发明专利
    未知

    公开(公告)号：DE59408703D1

    公开(公告)日：1999-10-14

    申请号：DE59408703

    申请日：1994-03-08

    Applicant: BASF AG

    Inventor： MARCZINKE BERND LOTHAR ,  KERTH JUERGEN ,  MUELLER PATRIK ,  BAUMGARTL HORST ,  ITTEMANN PETER

    IPC: C08F8/46 ,  C08F255/00 ,  C08F255/02 ,  C09J151/06 ,  D01F6/30

    Abstract: The present invention relates to propylene copolymers grafted to alpha , beta -ethylenic unsaturated carboxylic acids or carboxylic acid derivatives, comprising ai) a random propylene copolymer (A1) containing from 0.1 to 15 % by weight of copolymerised C2- to C10-alk-1-enes, or a2) a propylene copolymer (A2), a random propylene copolymer (I) containing from 0.1 to 15% by weight of copolymerised C2- to C10-alk-1-enes and a random propylene copolymer (II) containing from 15 to 80% by weight of copolymerised C2- to C10-alk-1-enes, or a3) a propylene copolymer (A3) comprising a propylene homopolymer (III) and a random propylene copolymer (IV) containing from 15 to 80% by weight of copolymerised C2- to C10-alk-1-enes, obtainable by reacting the monomer to be grafted with the propylene copolymer (A1), (A2) or (A3) at pressures of from 1 to 300 bar, where, in the presence of from 0.005 to 0.5% by weight of an initiator which decomposes to give free radicals, from 0.01 to 1.0% by weight of the monomer to be grafted, where both concentrations are based on the propylene copolymer, is mixed with the molten propylene copolymer, and the grafting reaction is carried out at from 200 to 350@C.

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