Process for preparing elastomeric ethylene copolymers
申请人:Montell Technology Company bv
公开号:US05532326A1
公开(公告)日:1996-07-02
Process for preparing elastomeric copolymers of ethylene with .alpha.-olefins CH.sub.2 .dbd.CHR, optionally containing minor proportions of a diene, characterized by the use during the polymerization of a catalyst comprising the reaction product of: (I) a solid component comprising VCl.sub.3 supported on a magnesium dihalide in spherical or spheroidal shape, in active form; (II) an alkyaluminum compound; (III) optionally a halohydrocarbon. VCl.sub.3 is precipitated on said magnesium dihalide by heating VCl.sub.4 solutions in inert hydrocarbon solvents.