Patent Number: 6,252,019

Title: Process for polymerizing tactioselective polyolefins in condensed phase using hafnocenes

Abstract: A process for polymerizing addition polymerizable monomers using hafnocenes catalysts/catalyst precursors having a selected symmetry condition under condensed polymerization conditions where the symmetry condition is such that the resulting polymer has varying degrees of tactioselectivity or copolymers having regions of varying degrees of tactioselectivity. Preferred classes of the haflocenes are capable of generating near pure isospecific and syndiospecific polymers in solution or in bulk polymerization conditions.

Inventors: Ewen; John A. (Houston, TX)

Assignee: Montell Technology Company BV

International Classification: C08F 10/00 (20060101); C08F 4/659 (20060101); C08F 4/00 (20060101); C08F 004/64 (); C08F 110/06 ()

Expiration Date: 06/26/2018