Process for the production of polyethylene compositions.

摘要

A process for producing a polyethylene composition which comprises polymerizing ethylene in the presence of a catalyst comprising (A) a contact treatment product of (a) a high activity catalyst component and (b) a filler, and (B) an organoaluminum compound, wherein the component (a) has such a high activity as to permit the production of at least 10 kilograms of polyethylene per gram of the the transition metal atom per unit ethylene partial pressure in low-pressure polymerization of ethylene in the presence of the component (a) and the component (B). This process has no need for an deashing step, i.e., a step to remove the catalyst after polymerization, since the catalyst has a remakably high activity. In the polyethylene composition produced, the filler is dispersed uniformly and the separation of the filler from the polyethylene is scarcely observed.