| 摘要 |
<p>Polymerization of an olefin or olefins comprises contacting (i) (a) a transition metal catalyst where a metal of Group 3 - 10 (new notation) is complexed to a neutral bidentate ligand and (b) an alkylaluminum cocatalyst and (ii) at least one olefin. Polymerization of an olefin or olefins comprises contacting under polymerization conditions (i) (a) a transition metal polymerization catalyst and (ii) at least one olefin. The catalyst is a metal of Group 3 - 10 complexed to a neutral bidentate and (b) an alkylaluminum cocatalyst. The cocatalyst has the formula R1>aXbAl0d(I) R1>independently hydrocarbyl or substituted hydrocarbyl; X : carboxylate or Z; Z : fluoride, chloride, bromide or iodide; a, b : independently about 0.5 - 1.5; and d : 0.5 - 1. provided that a+b+d is 2.0 - 2.5. An independent claim is also included for the polymerization of ethylene comprising contacting (i) (a) and (b) of specified formula (II) and (ii) ethylene. (b) has the formula R6>0>qAlZt(II) R6>0>R1>, and q, t : independently about 0.5 - 2.5. provided that q+t is about 3 and that the molar ratio of Al to the transition metal in the catalyst is 75 - 500.</p> |
