Copolymer, process for production thereof, and molded article thereof
AssigneeSumitomo Chemical Company, Limited
InventorsNobuo Oi, Tatsuya Miyatake
Life of this patent
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Abstract
A copolymer of an α-olefin with an alkenyl aromatic hydrocarbon having a structure in which tertiary carbon atoms are mutually separated by two methylene groups in the skeleton of the copolymer, a process for producing said copolymer with a specific catalyst and a molded article of said copolymer, and the copolymer and molded article thereof are transparent, excellent in elastic recoverability, flexibility, mechanical strength and scratch resistance.
Claims20
A copolymer of an α-olefin with an alkenyl aromatic hydrocarbon, having a structure at which tertiary carbon atoms are mutually separated by two methylene groups in the backbone of the copolymer.
A method for producing a copolymer of an α-olefin with an alkenyl aromatic hydrocarbon having a structure at which tertiary carbon atoms are mutually separated by two methylene groups in the skeleton of the copolymer, which comprises copolymerizing an α-olefin and an alkenyl aromatic hydrocarbon with a catalyst for olefin polymerization, prepared by a process comprising contacting the following (A), (B) and (C);
- (A) and (B);
- or (A) and (C):
- (A) a transition metal complex represented by the following general formula [I]:
- wherein M1 represents a transition metal atom of Group IV of the Periodic Table of the Elements;
- A represents an atom of Group XVI of the Periodic Table of the Elements;
- J represents an atom of Group XIV of the Periodic Table of the Elements;
- Cp1 represents a group having a cyclopentadiene anion skeleton;
- X1, X2, R1, R2, R3, R4, R5 and R6 independently represent a hydrogen atom, a halogen atom, an alkyl group, an aralkyl group, an aryl group, a substituted silyl group, an alkoxy group, an aralkyloxy group, an aryloxy group or a di-substituted amino group;
- and R1, R2, R3, R4, R5 and R6 may be optionally combined with each other to form a ring;
- (B) at least one aluminum compound selected from the following (B1) to (B3):
- (B1) an organoaluminum compound represented by the general formula E1aAlZ3−a,
- (B2) a cyclic aluminoxane having a structure represented by the general formula {—Al(E2)—O—}b, and
- (B3) a linear aluminoxane having a structure represented by the general formula E3{—Al(E3)—O—}cAlE32,
- wherein E1, E2and E3 each respectively represents a hydrocarbon group, all of E1, E2 and E3 may be the same or different, Z represents a hydrogen atom or a halogen atom, and all of Z may be the same or different, a represents a numeral of 0 to 3, b represents an integer of not less than 2, and c represents an integer of not less than 1;
- and
- (C) a boron compound of any one of the following (C1) to (C3):
- (C1) a boron compound represented by the general formula BQ1Q2Q3,
- (C2) a boron compound represented by the general formula G+(BQ1Q2Q3Q4)−, and
- (C3) a boron compound represented by the general formula (L-H)+(BQ1Q2Q3Q4)−,
- wherein B represents a boron atom in the trivalent valence state, Q1 to Q4 may be the same or different and represent a halogen atom, a hydrocarbon group, a halogenated hydrocarbon group, a substituted silyl group, an alkoxy group or a di-substituted amino group, G+ represents an inorganic or organic cation, L represents a neutral Lewis base, and (L-H)+ represents a Brønsted acid.
Dependencies are inferred from the claim text.