Catalyst component and catalyst for addition polymerization, and process for producing addition polymer

A catalyst for addition polymerization obtained by a process comprising bringing a transition metal compound (A) represented by the general formula (1):

• [LpXoCpjM(N2)nM′XmLlX′k[1], wherein M and M′ each independently represents a transition metal atom of Group 3 to 10 in the Periodic Table of the Elements;
• X each independently represents a hydrogen atom, halogen atom, alkyl group, aralkyl group, aryl group, substituted silyl group substituted with a hydrocarbon group, alkoxy group, aralkyloxy group, aryloxy group, di-substituted amino group substituted with two hydrocarbon groups, azido group, cyano group or isothiocyanate group;
• Cp is a group having a cyclopentadiene anion skeleton;
• L represents a group which bonds to M or M′ by lone pair of electrons or a 1 electron;
• X′ represents a counter anion;
• k, 1, m, o and p each independently represent an integer of O to 5;
• j represents an integer of 0 to 2;
• n+o+p+j≦6;
• n represents an integer of 1 to 3;
• and n+l+m≦6, into contact with
• an organoaluminum compound selected from the group consisting of the following (B 1), and
• at least one aluminoxane selected from the group consisting of the following (B2) and (B3) and/or the following (C), or with
• at least one aluminoxane selected from the group consisting of the following (B2) and (B3) and/or the following (C):
• (B1) organoaluminum compounds of the general formula E1aAlZ3-a,
• (B2) cyclic aluminoxanes having a structure of the general formula {—Al(E2)—O—}b,
• (B3) linear aluminoxanes having a structure of the general formula E3{—Al(E3)—O—}cAlE32,
• (wherein, each of E1, E2 and E3 represents a hydrocarbon group;
• all E1s, all E2s or all E3s maybe the same or different;
• Z represents a hydrogen atom or halogen atom;
• all Zs may be the same or different;
• a represents a number satisfying 0<a≦3;
• b represents an integer of 2 or more;
• and c represent an integer of 1 or more.), and
• (C) one or more boron compounds selected from the following (Cl) to (C3):
• (C1) boron compounds represented by the general formula BQ1Q2Q3,
• (C2) boron compounds represented by the general formula G+(BQ1Q2Q3Q4)—, and
• (C3) boron compounds represented by the general formula (L-H)+(BQ1Q2Q3Q4),
• wherein, B represents boron in trivalent state;
• Q1 to Q4 represent a halogen atom, hydrocarbon group, halogenated hydrocarbon group, substituted silyl group, alkoxy group or di-substituted amino group;
• they may be the same or different;
• G+represents an inorganic or organic cation;
• L represents a neutral Lewis base;
• and (L-H)+ represents a Bønsted acid.