| 摘要 |
<p>This invention relates to a polymerization process and to a catalyst composition for the polymerization of olefins comprising a catalyst composition for the polymerization of olefins comprising: a) a catalyst precursor of the formula (I) LMn+(X)y(R)(n-y-1), wherein L is a cycloalkadienyl ligand except for cyclopentadienyl and pentamethylcyclopentadienyl; M is an element selected from Groups 3 to 10 and the Lanthanides; each X is independently an anion; each R is a hydride or a group containing at least two carbons capable of attachment to M in a multihapto manner through at least one hydrogen or carbon atom; n is the valence of M; and y is an integer from 0 to 5; or b) a catalyst precursor of the formula (II) CpDa(JY)(Q)¿(a-2)?, wherein Cp is a cycloalkadienyl ligand, D is group 4, 5 or 6 metal, provided however that when Cp is a mono-cyclic cyclopentadienyl group, D is not titanium, a is the oxidation state of D, J is a group 15, 16 or 17 atom, Y is a heteroatom, a substituted heteroatom or a C1 to C100 hydrocarbyl group which may optionally contain one or more heteroatoms, each Q is independently an anionic leaving group, and c) an activator.</p> |
