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    • 3. 发明授权
    • Process for the production of cycloolefin-based random copolymer
    • 制备环烯烃基无规共聚物的方法
    • US5142007A
    • 1992-08-25
    • US735116
    • 1991-07-24
    • Toshihiro SaganeToshiaki KuroiwaShuji Minami
    • Toshihiro SaganeToshiaki KuroiwaShuji Minami
    • C08F2/06C08F4/60C08F4/68C08F32/00C08F36/00C08F210/00C08F210/02C08F232/00C08F232/02C08F232/08C08F236/20
    • C08F232/08C08F210/02Y10S526/903
    • A process for the production of a cycloolefin-based random copolymer, which comprises:(A) copolymerizing (a) ethylene and (b) at least one cycloolefin,(B) in the presence of a catalyst comprising a vanadium compound soluble in a mixed solvent described below and an organoaluminum compound.(C) in a mixed solvent comprising (a) a hydrocarbon-based solvent having a solubility parameter (.delta. value) of not less than 7.7 (cal/cm.sup.3).sup.1/2 and (b) a hydrocarbon-based solvent having a solubility parameter (.delta. value) of not more than 7.5 (cal/cm.sup.3).sup.1/2, the mixed solvent having a volume ratio (a)/(b) of 90/10 to 50/50. The said process permits the production of a copolymer in a higher concentration when copolymers having an identical molecular weight to that of conventional copolymers are produced, and permits the production of a copolymer having a higher molecular weight when copolymers are produced in an identical concentration to that of conventional copolymers.
    • 一种制备环烯烃基无规共聚物的方法,其包括:(A)在(a)乙烯和(b)至少一种环烯烃下共聚合(B)),在(B)催化剂存在下,将可溶于混合物 溶剂和有机铝化合物。 (C)在包含(a)溶解度参数(δ值)不小于7.7(cal / cm 3)1/2的烃类溶剂和(b)具有溶解度参数的烃基溶剂的混合溶剂中 (δ值)不超过7.5(cal / cm 3)1/2,混合溶剂的体积比(a)/(b)为90/10〜50/50。 当制备具有与常规共聚物相同的分子量的共聚物时,所述方法允许以更高的浓度制备共聚物,并且当以与该共聚物相同的浓度制备共聚物时,允许制备具有较高分子量的共聚物 的常规共聚物。