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    CYCLOOLEFIN COPOLYMERS HAVING HIGH TEAR STRENGTH AND LOW OPTICAL ATTENUATION
    14.
    发明专利
    CYCLOOLEFIN COPOLYMERS HAVING HIGH TEAR STRENGTH AND LOW OPTICAL ATTENUATION 未知

    公开(公告)号：CA2155937A1

    公开(公告)日：1994-08-18

    申请号：CA2155937

    申请日：1994-01-31

    Applicant: HOECHST AG

    Inventor： BREKNER MICHAEL-JOACHIM ,  DECKERS HELLMUTH ,  OSAN FRANK

    IPC: G02B6/00 ,  C08F4/42 ,  C08F4/642 ,  C08F4/646 ,  C08F4/659 ,  C08F4/6592 ,  C08F4/68 ,  C08F4/72 ,  C08F8/00 ,  C08F12/00 ,  C08F32/00 ,  C08F210/00 ,  C08F212/00 ,  C08F232/00 ,  C08F232/08 ,  G02B1/04

    Abstract: A process for the preparation of a copolymer of cycloolefin copolymer (COC) having high tear strength by copolymerization of 0.1 to 99.9% by weight, based on the total amount of the monomers, of at least one monomer in which R1, R2, R3, R4, R5, R6, R7 and R8 are identical or different and are a hydrogen atom or a C1-C8-alkyl radical or a C6-C16-aryl radical, where identical radicals in the various formulae can have different meanings, from 0 to 99.9% by weight, based on the total amount of the monomers, of a cycloolefin in which n is a number from 2 to 10, and from 0.1 to 99.9% by weight, based on the total amount of the monomers, of at least one acyclic 1-olefin in which R9, R10, R11 and R12 are identical or different and are a hydrogen atom or a C1-C8-alkyl radical or a C6-C16-aryl radical, in solution, in suspension, in a liquid cycloolefin monomer or cycloolefin monomer mixture or in the gas phase, at a temperature of from -78 to 150.degree.C, at a pressure of from 0,5 to 64 bar, in the presence of a catalyst comprising a metallocene as transition-metal component and an aluminoxane for the linear type and/or for the cyclic type, where, in the formulae VII and VIII, R13 is a C1-C6-alkyl group or phenyl or benzyl, and n is an integer from 2 to 50, where the polymerization is carried out in the presence of a catalyst whose transition-metal component is at least one compound of the formula IX in which M1 is titanium, zirconium, hafnium, vanadium, niobium or tantalum, R14 and R15 are identical or different and are a hydrogen atom, a halogen atom, a C1-C10-alkyl group, a C1-C10-alkoxy group, a C6-C10-aryl groups a C6-C10-aryloxy group, a C2-C10-alkenyl group, a C7-C40-arylalkyl group, a C7-C40-alkylaryl group or a C8-C40-arylalkenyl group, and m may be one or two, dependigng on the valency of the central atom M1, R18 is =BR19, =AIR19, -Ge-, -Sn-, -O-, -S-, =SO, =SO2, =NR19, =CO, = PR19 or =P(O)R19, where R19, R20 and R21 are identical or different and are a hydrogen atom, a halogen atom, a C1-C10-alkyl group, a C1-C10-fluoroalkyl group, a C6-C10-fluoro-aryl group, a C6-C10-aryl group, a C1-C10-alkoxy group, a C2-C10-alkenyl group, a C7-C40-arylalkyl group, a C8-C40-arylalkenyl group or a C7-C40-alkylaryl group, or R19 and R20 or R19 and R21, in each case with the atoms connecting them, form a ring, M2 is silicon, germanium or tin, R16 and R17 are identical or different and are a mono cyclic or polycyclic hydrocarbon radical which can form a sandwich structure with the central atom M1, wherein the metallocene of the formula IX has C2symmetry with respect to the ligands R16 and R17 and with respect to the central atom M1 connecting them in the case where R16 and R17 are identical and has C1-symmetry in the case where R16 and R17 are different.

    20.
    发明专利
    未知

    公开(公告)号：NO914439D0

    公开(公告)日：1991-11-13

    申请号：NO914439

    申请日：1991-11-13

    Applicant: HOECHST AG

    Inventor： BREKNER MICHAEL-JOACHIM ,  OSAN FRANK ,  ROHRMANN JUERGEN ,  ANTBERG MARTIN

    IPC: C08F4/642 ,  C08F4/60 ,  C08F4/6592 ,  C08F6/26 ,  C08F10/14 ,  C08F32/00 ,  C08F32/08 ,  C08F210/00 ,  C08F232/08 ,  C08F

    Abstract: Polymers of polycyclic olefins such as, for example, norbornene or tetracyclododecene, or copolymers of polycyclic olefins with cycloolefins and/or 1-olefins are obtained without ring opening, in high space-time yield, with high cycloolefin incorporation rate and at industrially favourable polymerisation temperatures by a bulk polymerisation in which the catalyst used consists of an aluminoxane and of a stereorigid, chiral metallocene compound of an element of groups IVb to VIb, where the hydrocarbon radicals forming the sandwich structure are different.

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