Patent ID: 6107232
Filing Date: 2000-08-22
Classification: C08F

Abstract:
A polymerization catalyst which comprises (A) a transition metal compound represented by the general formula (I)L.sub.d MX.sub.e Y.sub.f Z.sub.g (I)wherein M represents Ti, Zr or Hf, L represents a formula ##STR5## wherein A and E each represent N (nitrogen) or O (oxygen), D represents C (carbon) or Si (silicon), and at least one of A and E represents N (nitrogen), and A-D, D-D and D-E each is linked by a single bond, a double bond or a combination thereof; A is bonded to M, E is coordinated with M in the case that E has a lone pair, or E is bonded by resonance in the case that the resonance occurs among M, A, D and E; n represents an integer of 0 to 10; ((R.sup.2).sub.b -D)s may be the same or different; R.sup.1, R.sup.2 and R.sup.3 each represents a hydrogen atom, a halogen atom, an alkoxy group, a hydrocarbon group or a hetero-atom-containing hydrocarbon group, may be the same or different from each one another and may crosslink thereamong, and R.sup.1, R.sup.2, R.sup.3 and M may crosslink thereamong; a, b and c each is an integer of 0 to 2; d is 1 or 2; Ls may be the same or different from each other and may crosslink therebetween; X represents a ligand having conjugated .pi. electrons; e is 0 or 1; and the L group and the X group may crosslink therebetween; Y represents a .sigma.-bond ligand or a chelate ligand; d+e+f=4; and Ys may be the same or different from each other; Z represents a Lewis base; g is an integer of 0 to 4; and Zs may be the same or different from each other; and(B) an activation cocatalyst.