PRODUCTION OF POLYETHYLENE FOR BLOW MOULDING

摘要

A process for producing high density polyethylene suitable for blow moulding and having high environmental stress cracking resistance and rigidity copolymerising ethylene and an alpha-olefinic comonomer comprising from 3 to 10 carbon atoms, in the presence of a chromium-based catalyst, having an alumina-containing support, and an organoboron compound, wherein the atomic ratio of boron in the organoboron compound to the chromium in the chromium-based catalyst is from around 0.2 to around 0.4.