Catalyst for polymerization of olefin, and process for production of olefin polymer

Abstract

Disclosed is a catalyst for use in the polymerization of an olefin, which is produced by contacting a specific transition metal compound (A1), a specific transition metal compound (A2) and a specific solid catalyst component (B) with one another, wherein the component (A1) and the component (A2) are contacted with each other at a molar ratio (i.e., (A1) / (A2) ratio) of 1 to 90. (A1) (A2) wherein M1 and M2 independently represent a transition metal atom belonging to Group IV on the periodic table; X1, X2, R1, R3 and R4 independently represent a hydrogen atom, a halogen atom, a hydrocarbyl group, a hydrocarbyloxy group or the like; and Q1 and Q2 independently represent a specific cross-linking group.

Description

technical field The present invention relates to an olefin polymerization catalyst and a method for producing olefin polymer. Background technique Olefin polymers such as ethylene-α-olefin copolymers are molded into articles such as films, sheets and bottles by various molding methods, and these molded articles are used in various applications such as food packaging materials. Ethylene-α-olefin copolymers produced with metallocene catalysts are well known in the art, and said copolymers are so excellent in their mechanical strength such as impact strength and tensile strength that thin-walled molded articles can be expected to be obtained from these copolymers (thus obtain lightweight, low-cost molded articles) while maintaining their mechanical strength, and have been investigated for their use for various applications. However, the extrusion load of ethylene-α-olefin copolymers produced with conventional metallocene catalysts is so high under extrusion, the tensile stren...

AI Technical Summary

Problems solved by technology

However, the above-mentioned novel ethylene-α-olefin copolymers are still not satisfactory in their molding processability.

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