Patent ID: 7851395
Filing Date: 2010-12-14
Classification: C08F

Abstract:
1. A method for activating a Ziegler-Natta pre-catalyst component comprising: providing a finished Ziegler-Natta pre-catalyst component, wherein the Ziegler-Natta pre-catalyst component comprises magnesium, titanium, an amount of chlorine sufficient to fully chlorinate Mg and Ti to form MgCl submitting the pre-catalyst to a thermal treatment carried out at a temperature of from 80 to 150° C. under vacuum of about 10 treating the pre-catalyst by adding a Lewis acid MX optionally further treating the Ziegler-Natta pre-catalyst component with a titanium compound TiX adding aluminum compound of general formula AlR optionally adding an external electron donor either of general formula SiR