Method for the preparation of copolymers of ethylene/norbornene-type monomers with cationic palladium catalysts
    10.
    发明授权
    Method for the preparation of copolymers of ethylene/norbornene-type monomers with cationic palladium catalysts 失效
    乙烯/降冰片烯型单体与阳离子钯催化剂的共聚物的制备方法

    公开(公告)号:US06265506B1

    公开(公告)日:2001-07-24

    申请号:US09094349

    申请日:1998-06-09

    IPC分类号: C08F480

    摘要: A method of preparing generally amorphous copolymers of ethylene and at least one norbornene (NB)-type comonomer. These polymers may be random or alternating, depending on the choice of catalyst and/or the relative ratio of the monomers used. This method comprises polymerizing said monomers in a diluent or in bulk in the presence of a cationic palladium catalyst resulting from reacting a chelating ligand with a palladium (II) compound. The catalysts employed in this invention may be represented by the formula: wherein X and Y each independently is a donor heteroatom selected from P, N, O, S and As or an organic group containing said heteroatoms, and the heteroatoms are bonded to the bridging group A; A is a divalent group selected from an organic group and phosphorus forming together with X, Y and Pd a 4, 5, 6, or 7-membered ring, and preferably a 5-membered ring; R is a hydrocarbyl group; and CA is a weakly coordinating anion.

    摘要翻译: 通常制备乙烯和至少一种降冰片烯(NB)型共聚单体的无定形共聚物的方法。 这些聚合物可以是随机的或交替的,这取决于催化剂的选择和/或所用单体的相对比例。 该方法包括在由螯合配体与钯(II)化合物反应得到的阳离子钯催化剂的存在下,以稀释剂或本体聚合所述单体。 本发明中使用的催化剂可以由下式表示:其中X和Y各自独立地是选自P,N,O,S和As的供体杂原子或含有所述杂原子的有机基团,并且杂原子与桥连基团键合 A; A是选自有机基团的二价基团和与X,Y和Pd一起形成的磷,4,5,6或7元环,优选为5元环; R为烃基; 而CA是弱配位阴离子。