Polymerization catalysts and method for preservation of same

摘要

The invention provides a polymerization catalyst produced by bringing components (A) to (D) into contact with one another in a hydrocarbon solvent at 30 to 60° C., wherein the component (A) is a transition metal compound, the component (B) is a solid boron compound capable of forming an ion pair with component (A), the component (C) is an organoaluminum compound, and the component (D) is one or more unsaturated hydrocarbon compounds selected from among an α-olefin, an internal olefin, and a polyene; and the amounts of component (B) and component (C) are 1.2 to 4.0 mol and 5.0 to 50.0 mol, respectively, on the basis of 1 mol of component (A), which catalyst exhibits high activity and can be readily supplied to a polymerization reaction system. The invention also provides a method of storing the polymerization catalyst at 0 to 35° C.

主权项

1. A homogenous polymerization catalyst, obtained by a process comprising:
contacting a component (A), a component (B), a component (C), and a component (D) with one another in at least one hydrocarbon solvent at a temperature in a range of 30 to 60° C., wherein the component (A) is a transition metal compound, the component (B) is a solid boron compound capable of forming an ion pair with the component (A), the component (C) comprises an organoaluminum compound, and the component (D) comprises at least one unsaturated hydrocarbon compound selected from the group consisting of an α-olefin, an internal olefin, and a polyene, an amount of the component (B) and the component (C) is 1.2 to 4.0 mol and 5.0 to 50.0 mol, respectively, based on 1 mol of the component (A), and an amount of the component (D) is 1.0 to 200 parts by mass, based on 1 part by mass of the component (A).