Patent ID: 6034187
Filing Date: 2000-03-07
Classification: C08F

Abstract:
An olefin polymerization catalyst comprising a modified clay compound (a) having an average particle diameter of less than 10 .mu.m, a transition metal compound (b), and an organoaluminum compound (c), wherein the modified clay compound is formed by contacting a laminar clay compound with an onium compound represented by the following formula (29):[R.sup.19.sub.n GH].sup.+ [A].sup.- ( 29)wherein G is an element selected from Groups 15 and 16 of the Periodic Table, each R.sup.19 is independently a hydrogen atom or a hydrocarbon group of 1 to 20 carbon atoms and at least one R.sup.19 is a hydrocarbon group of 1 to 20 carbon atoms, and n=3 when G is selected from Group 15 and n=2 when G is selected from Group 16, and [A].sup.- is a counter ion.