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    61.
    发明专利
    未知

    公开(公告)号：DE50003285D1

    公开(公告)日：2003-09-18

    申请号：DE50003285

    申请日：2000-05-03

    Applicant: BASF AG

    Inventor： DECKERS ANDREAS ,  WEBER WILHELM

    IPC: F16H55/06 ,  C08F2/00 ,  C08F2/01 ,  C08F2/02 ,  C08F210/02 ,  C08L23/08 ,  C08L77/00

    Abstract: Copolymers of ethylene have from 1 to 30 mol % of alkyl(meth)acrylates and, if desired, other comonomers, and have a residual comonomer content of less than 0.5% by weight in the copolymer. A process for preparing copolymers of this type in a combination of stirred autoclave and tubular reactor is described, as is the use of the copolymers for preparing polyamide molding compositions.

    64.
    发明专利
    未知

    公开(公告)号：DE10006900A1

    公开(公告)日：2001-08-23

    申请号：DE10006900

    申请日：2000-02-16

    Applicant: BASELL POLYOLEFINE GMBH ,  BASF AG

    Inventor： MAEHLING FRANK-OLAF ,  DECKERS ANDREAS ,  LITTMANN DIETER ,  SUTORIS HEINZ FRIEDRICH ,  EVERTZ KASPAR

    IPC: C08F2/01 ,  C08F2/38 ,  C08F2/40 ,  C08F10/00 ,  C08F110/02 ,  C08F297/08 ,  C08F10/02

    Abstract: The invention relates to a method for polymerizing or copolymerizing ethylenically unsaturated monomers in the presence of radically decomposing polymerization initiators in a continuously operating polymerization device. Said polymerization device is composed of a fresh gas supply, a pre-compressor, a post-compressor, a reactor, a pressure maintaining valve, of a high-pressure circuit, which is provided with a high-pressure product separator and with a high-pressure circuit gas return, and of a product valve and a low-pressure circuit, which is provided with a low-pressure product separator and with a low-pressure circuit gas return. The inventive method is characterized in that nitrogen monoxide or oxygen is added in a dosed manner as an inhibitor into the high-pressure circuit, into the low-pressure circuit and/or into the pre-compressor.

    65.
    发明专利
    未知

    公开(公告)号：DE19859391A1

    公开(公告)日：2000-06-29

    申请号：DE19859391

    申请日：1998-12-22

    Applicant: BASF AG

    Inventor： SUTORIS HEINZ FRIEDRICH ,  DECKERS ANDREAS ,  WEBER WILHELM

    IPC: C07B63/04 ,  C07C7/20 ,  C07C11/02 ,  C07C11/04 ,  C08F2/40 ,  C08F2/44 ,  C08F10/00 ,  C08F210/00 ,  C08F236/06

    Abstract: A process for the compression of ethylenically unsaturated monomers at a pressure of 200-5,000 bar in the absence of a polymerization initiator is carried out in the presence of a nitroxyl compound (I). A process for the condensation of ethylenically unsaturated monomers at a pressure of 200-5,000 bar in the absence of a polymerization initiator is carried out in the presence of a nitroxyl compound of formula (I). Independent claims are included for: (i) a process for the production of copolymers by condensation of the comonomer, optionally as a mixture in the presence of (I) followed by polymerization at 50-350 degrees C by addition of a polymerization initiator; (ii) the resulting copolymer product. R , R = 1-4C alkyl or R and R together with the C atom they are bonded to form a 5 or 6 C saturated hydrocarbon ring; R = 1-4C alkyl; R = H or 1-12C alkyl.

    66.
    发明专利
    未知

    公开(公告)号：NO20002778D0

    公开(公告)日：2000-05-30

    申请号：NO20002778

    申请日：2000-05-30

    Applicant: BASF AG

    Inventor： DECKERS ANDREAS ,  WENDEROTH BERND ,  WEDEL PETER ,  WEBER WILHELM

    IPC: C10L1/18 ,  C08F2/00 ,  C08F210/02 ,  C08F218/08 ,  C10L1/197 ,  C08F

    Abstract: In a process for preparing ethylene-vinyl acetate copolymers in which a mixture of ethylene and vinyl acetate is polymerized continuously in the presence of free-radical polymerization initiators and, if desired, molecular weight regulators in a cooled tube reactor at a pressure in the range from 1000 to 3500 bar, and the poly-merization initiator is added at the beginning and at two or more points along the tube reactor, and temperature changes in the reaction mixture along the tube reactor, between the first temperature maximum and the last addition of the polymerization initiator, are within a range of not more than 20° C.

    Process for preparing low-molecular ethylene polymers under high pressure
    70.
    发明专利
    Process for preparing low-molecular ethylene polymers under high pressure 未知

    公开(公告)号：AU2701297A

    公开(公告)日：1997-11-19

    申请号：AU2701297

    申请日：1997-04-24

    Applicant: BASF AG

    Inventor： MOLL ULRICH ,  DECKERS ANDREAS ,  KINGMA AREND JOUKE ,  WEBER WILHELM

    IPC: C08F2/00 ,  C08F4/44 ,  C08F4/46 ,  C08F4/50 ,  C08F4/622 ,  C08F4/639 ,  C08F4/6392 ,  C08F4/642 ,  C08F4/68 ,  C08F10/02 ,  C08F110/02

    Abstract: A process is disclosed for preparing ethylene polymers with a molecular weight Mw (weight average) lower than 20,000 g/mole at temperatures in a range from 200 to 280 DEG C and pressures in a range from 1000 to 3500 bars in the presence of a catalyst system. The catalyst system used contains: (A) a non-bridged substituted or unsubstituted biscyclopentadienyl complex; (B) a metal compound of general formula (I) M (R )r (R )s (R )t, in which M is an alkaline, an alkaline earth metal or a metal of the third main group of the periodic table; R is hydrogen, C1-C10-alkyl, C6-C15-aryl, alkylaryl or arylalkyl with 1 to 10 C atoms in the alkyl radical and 6 to 20 C atoms in the aryl radical; R and R independently represent hydrogen, halogen, C1-C10-alkyl, C6-C15-aryl, alkylaryl, arylalkyl or alkoxy with 1 to 10 C atoms in the alkyl radical and 6 to 20 C atoms in the aryl radical; r is an integer from 1 to 3; and s and t are integers from 0 to 2, the sum r+s+t corresponding to the valency of M ; and (C) a metallocene ion-forming compound selected in a group which consists of strong, neutral Lewis acids, ionic compounds with lewis acid cations and ionic compounds with Brönsted acids as cations. Components (A), (B) and (C) are mixed together and after at the latest 5 minutes are dosed in the reactor.

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