Patent ID: 9181359
Filing Date: 2015-11-10
Classification: B29C,B29K,C08F,C08J,Y10T

Abstract:
1. A method of production of ethylene-based polymer particles; wherein the method comprises the step of: homopolymerizing ethylene or copolymerizing ethylene and a linear or branched α-olefin having 3 to 20 carbon atoms in the presence of an olefin polymerization catalyst comprising: (A) fine particles having an average particle diameter greater than or equal to 1 nm and less than or equal to 300 nm obtained at least by the following two steps: (Step 1) causing contact between a metal halide and an alcohol in a hydrocarbon solvent wherein the alcohol is a combination of two types of alcohols selected from alcohols having 1 to 25 carbon atoms and difference in carbon number of the two types of alcohols is greater than or equal to 4; (Step 2) causing contact between a component obtained by (Step 1) and an organoaluminum compound and/or an organoaluminumoxy compound; and (B) a transition metal compound represented in following General Formula (I) or (II): wherein in Formula (I), M is a transition metal atom of Group 4 or 5 in the periodic table; m is an integer ranging from 1 to 4; R R n is a number satisfying valence number of M; X is a hydrogen atom, halogen atom, hydrocarbon group, oxygen-containing group, sulfur-containing group, nitrogen-containing group, boron-containing group, aluminum-containing group, phosphorous-containing group, halogen-containing group, heterocyclic compound residue, silicon-containing group, germanium-containing group, or tin-containing group; wherein multiple groups indicated by X may be the same or different when n is greater than or equal to 2; and optionally multiple groups indicated by X form a ring by mutual bonding wherein in Formula (II), M is titanium, zirconium, or hafnium; R X Y is a divalent hydrocarbon group, divalent halogenated hydrocarbon group, divalent silicon-containing group, divalent germanium-containing group, divalent tin-containing group, —O—, —CO—, —S—, —SO—, —SO wherein an intrinsic viscosity [η] of the ethylene-based polymer particles, measured in decalin at 135° C., is from 5 to 50 dL/g.