申请人:MITSUI PETROCHEMICAL INDUSTRIES, LTD.
公开号:EP0156464A1
公开(公告)日:1985-10-02
A random copolymer composed of ethylene, a 1,4,5,8-dimethano-1,2,3,4,4a,5,8,8a-octahydronaphthalene and optionally an alpha-olefin having at least three carbon atoms or cycloolefin. The mole ratio of polymerized units from the 1,4,5,8-dimethano-1,2,3,4,4a,5,8,8a-octahydronaphthalene to polymerized units from ethylene is from 3:97 to 95:5 and the 1,4,5,8-dimethano-1,2,3,4,4a,5,8,8a-octahydronaphthalene is incorporated in the polymer chain as polymerized units without ring-opening.
The copolymer is prepared by copolymerizing ethylene, optionally the alpha-olefin of at least 3 carbon atoms or cycloolefin, with the 1,4,5,8-dimethano-1,2,3,4,4a,5,8,8a-octahydronaphthalene in a hydrocarbon medium in the presence of a catalyst formed from a vanadium compound and an organoaluminum compound which are soluble in the hydrocarbon medium.
The copolymer has excellent transparency and a well balanced-combination of heat resistance, heat aging resistance, chemical and solvent resistance, dielectric properties and mechanical properties such as rigidity.
一种无规共聚物,由乙烯、1,4,5,8-二甲烷基-1,2,3,4,4a,5,8,8a-八氢萘和一种具有至少三个碳原子的α-烯烃或环烯烃组成。1,4,5,8-二甲桥-1,2,3,4,4a,5,8,8a-八氢萘的聚合单元与乙烯的聚合单元的摩尔比为 3:97 至 95:5,1,4,5,8-二甲桥-1,2,3,4,4a,5,8,8a-八氢萘作为聚合单元加入聚合物链中,不需要开环。
共聚物的制备方法是:在烃介质中,在由钒化合物和有机铝化合物(可溶于烃介质)组成的催化剂的存在下,将乙烯、至少 3 个碳原子的α-烯烃或环烯烃、1,4,5,8-二甲烷基-1,2,3,4,4a,5,8,8a-八氢萘共聚。
这种共聚物具有极佳的透明度,并在耐热性、耐热老化性、耐化学性和耐溶剂性、介电性能和机械性能(如刚性)方面具有良好的平衡组合。