Patent ID: 6838409

Claim:
A catalyst for copolymerization of olefins and styrenes, which comprises: (A) a transition metal compound represented by any of the following general formulae (2) to (6): Q 1 a (C 5 H 5-a-b R 8 b )(C 5 H 5-a-c R 9 c )M 1 X 1 Y 1 (2) Q 2 a (C 5 H 5-a-d R 10 d ) Z 1 M 1 X 1 Y 1 (3) (C 5 H 5 ,R 11 e ) M 1 X 1 Y 1 W 1 (4) M 1 X 1 Y 1 W 1 U 1 (5) L 1 L 2 M 2 X 1 Y 1 (6) in which Q 1 represents a bonding group that crosslinks the two conjugated five-membered cyclic ligands (C 5 H 5-a-b R 8 b ) and (C 5 H 5-a-c R 9 c );Q 2 represents a bonding group that crosslinks the conjugated five-membered cyclic ligand (C 5 H 5-a-d ,R 10 d ) and the group Z 1 ; R 8 , R 9 , R 10 and R 11 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; and a plurality of these groups, if any, may bc the same or different, and may be bonded to each other to form a cyclic structure; a represents 0, 1 or 2; b, c and d each represent an integer of from 0 to 5 when a=0, or an integer of from 0 to 4 when a=1, or an integer of from 0 to 3 when a−2; e is an integer of from 0 to 5; M 1 represents a transition metal of Groups 4 to 6 of the Periodic Table; M 2 represents a transition metal of Groups 8 to 10 of the Periodic Table; L 1 and L 2 each represent a coordination-bonding ligand; X 1 , Y 1 , Z 1 , W 1 and U 1 each represent a covalent-bonding or ionic-bonding ligand; and L 1 , L 2 , X 1 , Y 1 , Z 1 , W 1 and U 1 may be bonded to each other to form a cyclic structure, (B) an oxygen-containing compound represented by any of the following general formulae (8) to (9): wherein R 21 to R 27 each represent an alkyl group having from 1 to 8 carbon atoms and may be the same or different, and R 26 and R 2 ′ may be the same or different. Y 2 to Y 6 each represent an element of Group 13 of the Periodic Table, Y 2 to Y 4 may be the same or different; and Y 5 and Y 6 may be the same or different, a to d each indicates a number of from 0 to 50, but (a+b) and (c+d) each must be at least 1, (C) a compound of a general formula (1): ((R 1 ) 3 —X—Y)n-Z—(R 2 )m-n (1) wherein R 1 a phenyl group; X represents an element of Group 14; Y represents an element of Group 16; Z represents a metal element of Groups 2 to 13; R 2 represents a hydrocarbon group; m is an integer, indicating the valency of the metal element Z; and n is an integer of from 1 to (m-1), and optionally, (D) an alkylating agent represented by any of the following general formulae (12) to (14): R 31 m Al(OR 32 ) n X 3−m−n (12) R 31 2 Mg (13) R 31 2 Zn (14) wherein R 31 and R 32 each represent an alkyl group having from 1 to 8 carbon atoms; X represents a hydrogen atom or a halogen atom, 0<m≦3, 0≦n<3.