The invention relates to a phosphine-substituted vinyl containing
metallocene catalyst, and also to the preparation process of the same as
well as to the application of the catalyst. The catalyst has the general
formula of Cp.sub.2(CR.sup.1.dbd.CR.sup.2(P(R.sup.3).sub.2))MX, wherein
Cp is a ligand containing cyclopentadiene having 1.about.5 substitutions,
of which two neighbors connecting to each other to form fused rings
having more than two members; R.sup.1-R.sup.3 is selected from the groups
consisting of hydrogen, C.sub.1.about.C.sub.18 alkyl or perfluoro-alkyl,
C.sub.6.about.C.sub.24 aralkyl or alkaryl; M is selected from the groups
consisting of metals of the IVB group; and X is selected from the groups
consisting of halogens, C.sub.1.about.C.sub.24 alkyl alkoxyl, silicone or
alkaryl. With aluminoxane or modified aluminoxane, aluminum alkyl,
halogenated aluminum alkyl or their mixture as the catalyst promoter the
phosphine-substituted vinyl containing metallocene catalyst may be
employed as the major catalyst for the polymerization or copolymerization
of alpha-olefin. Due to its high activity, the polymerization may occur
at both high and low temperatures with the polymer having higher
molecular weight and broader molecular weight distribution.