PROCESS FOR THE PREPARATION OF HIGH PURITY PROPYLENE POLYMERS

摘要

A process for the preparation of high purity propylene polymers carried out in the presence of a catalyst comprising the product obtained by reacting:-an organo-aluminium compound, with-a solid catalyst component comprising Mg, Ti and electron donor compound selected from specific diolesters, said process being carried out employing an organo-aluminum/propylene ratio equal to or lower than 1.75 mmole/kg.