METHOD FOR PRODUCING ETHYLENE-BASED POLYMER PARTICLES, AND STRETCH-MOLDED ARTICLE OBTAINED FROM ETHYLENE-BASED POLYMER PARTICLES

摘要

A method of production of ethylene-based polymer particles includes the steps of:
homopolymerizing ethylene or copolymerizing ethylene and a linear or branched ±-olefin having 3 to 20 carbon atoms in the presence of an olefin polymerization catalyst including:
(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;
(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 General Formula (I) or (II),
And
(E) an intrinsic viscosity [·] of the ethylene-based polymer particles, measured in decalin at 135°C, is from 5 to 50 dL/g.