| 主权项 |
1. A method for producing an olefin block polymer, the method comprising:
polymerizing olefins using a polymerization catalyst (X) and an organometallic compound (C) containing an atom of any of Groups 2, 12, and 13 of the periodic table of the elements, the organometallic compound (C) excluding an activating co-catalyst agent (B), wherein the polymerization catalyst (X) is formed by bringing a transition metal compound (A) into contact with the activating co-catalyst agent (B), and the transition metal compound (A) is represented by the following general formula (1), where n is 1, 2, or 3; MX represents a titanium atom, a zirconium atom, or a hafnium atom; RX1 to RX8 are independently:
a hydrogen atom,a halogen atom,an alkyl group having 1 to 20 carbon atoms,a cycloalkyl group having 3 to 10 ring carbon atoms,an alkenyl group having 2 to 20 carbon atoms,an alkynyl group having 2 to 20 carbon atoms,an aralkyl group having 7 to 30 carbon atoms,an aryl group having 6 to 30 carbon atoms,an alkoxy group having 1 to 20 carbon atoms,an aralkyloxy group having 7 to 30 carbon atoms,an aryloxy group having 6 to 30 carbon atoms,a substituted silyl group, ora heterocyclic compound residue having 3 to 20 ring carbon atoms; the alkyl groups, the cycloalkyl groups, the alkenyl groups, the alkynyl groups, the aralkyl groups, the aryl groups, the alkoxy groups, the aralkyloxy groups, the aryloxy groups, and the heterocyclic compound residues represented by RX1 to RX8 each optionally have a substituent; notwithstanding the above definitions of RX1 to RX8, each of the following pairs, RX1 and RX2, RX2 and RX3, RX3 and RX4, RX5 and RX6, RX6 and RX7, and RX7 and RX8, are optionally linked to each other to form a ring optionally having a substituent; each XX is independently:
a hydrogen atom,a halogen atom,an alkyl group having 1 to 20 carbon atoms,a cycloalkyl group having 3 to 10 ring carbon atoms,an alkenyl group having 2 to 20 carbon atoms,an aralkyl group having 7 to 30 carbon atoms,an aryl group having 6 to 30 carbon atoms,an alkoxy group having 1 to 20 carbon atoms,an aralkyloxy group having 7 to 30 carbon atoms,an aryloxy group having 6 to 30 carbon atoms,a substituted silyl group having 1 to 20 carbon atoms,a substituted amino group having 1 to 20 carbon atoms,a substituted thiolate group having 1 to 20 carbon atoms, ora carboxylate group having 1 to 20 carbon atoms; the alkyl group, the cycloalkyl group, the alkenyl group, the aralkyl group, the aryl group, the alkoxy group, the aralkyloxy group, the aryloxy group, and the carboxylate group represented by XX optionally have a substituent; XX groups are optionally linked to each other to form a ring; EX is independently a neutral Lewis base, and the subscript x representing the number of EX groups is 0, 1, or 2; when the subscript x is 2, the EX groups are the same or different, the activating co-catalyst agent (B) is selected from among an organoaluminumoxy compound (B-1), an organoboron compound (B-2), a zinc co-catalyst component (B-3), and ion-exchange layered silicate (B-4), wherein the olefin block polymer is an ethylene/propylene copolymer composition that satisfies the following requirements (1) through (5): (1) EPCXIS≧3.0 wt %; (2) ΔEP≦20%; (3) 15.0≧Mw/Mn≧1.7; (4) (Tm of the ethylene/propylene copolymer composition)≧135° C.; and (5) (Tg of the ethylene/propylene copolymer composition)≦−30° C. where: EPCXIS represents an EP (ethylene/propylene random copolymer) content in a room temperature xylene insoluble component; ΔEP is an arithmetic mean of absolute values of ratio differences of five triads, excluding PPP (propylene triad), each of the ratio differences being a difference between a ratio of one of the five triads in the room-temperature xylene-insoluble component and a ratio of the triad in the room-temperature xylene-soluble component; Mw/Mn represents a molecular weight distribution; Tm represents a melting point; and Tg represents a glass transition point. |
