Patent ID: 9029284
Filing Date: 2015-05-12
Classification: C08F,Y10S

Abstract:
1. A process for preparing polypropylene homopolymers or propylene copolymers polymerized from propylene and at least one comonomer; wherein the process comprises reacting propylene and optionally at least one comonomer in the presence of a solid particulate catalyst free from an external carrier, wherein the solid particulate catalyst comprises: (i) a complex of formula (I): wherein M is zirconium or hafnium; each X is a sigma ligand; L is a divalent bridge selected from —R′ each R each R each R each R each W is independently a 5 or 6 membered aryl or heteroaryl ring wherein each atom of the aryl or heteroaryl ring is optionally substituted with an R each R (ii) a cocatalyst comprising an organometallic compound of a Group 13 metal.