Patent ID: 6316557
Filing Date: 2001-11-13
Classification: C08F,Y10S

Abstract:
A catalyst for polymerizing olefinic monomers, which comprises:(a) a transition metal compound represented by formula (1) or (2):Q.sup.1.sub.a (C.sub.5 H.sub.5-a-b R.sup.1.sub.b)(C.sub.5 H.sub.5-a-c R.sup.2.sub.c)M.sup.1 X.sup.1.sub.p Y.sup.1.sub.q (1)Q.sup.2.sub.a (C.sub.5 H.sub.5-a-d R.sup.3.sub.d)Z.sup.1 M.sup.1 X.sup.1.sub.p Y.sup.1.sub.q (2)wherein Q.sup.1 represents a bonding group that crosslinks two conjugated, 5-membered cyclic ligands, C.sub.5 H.sub.5-a-b R.sup.1.sub.b and C.sub.5 H.sub.5-a-c R.sup.2.sub.c ; Q.sup.2 represents a bonding group that crosslinks the conjugated, 5-membered cyclic ligand, C.sub.5 H.sub.5-a-d R.sup.3.sub.d, and the group Z.sup.1 ; R.sup.1, R.sup.2 and R.sup.3 each represent a hydrocarbon group, a halogen atom, an alkoxy group, a silicon-containing hydrocarbon group, a phosphorus-containing hydrocarbon group, a nitrogen-containing hydrocarbon group or a boron-containing hydrocarbon group; M.sup.1 represents a transition metal of Groups IV to VI of the Periodic Table; X.sup.1, Y.sup.1 and Z.sup.1 each represents a covalent-bonding or ionic-bonding ligand; a is 0, 1 or 2; with the provisos:1) when a=0, b, c and d each is 0 or an integer of 1 to 5;2) when a=1, b, c and d each is 0 or an integer of 1 to 4;3) when a=2, b, c and d each is 0 or an integer of 1 to 3;p+q equals the valence of M.sup.1 minus 2; and X.sup.1 and Y.sup.1 may be bonded to each other to form a cyclic structure;(b) at least one member selected from the group consisting of clay, clay minerals and ion-exchanging layered compounds; and(c) a silane compound.