Patent ID: 7750086
Filing Date: 2010-07-06
Classification: C08F

Abstract:
1. A process for modifying the melt properties of propylene-ethylene copolymers comprising contacting a propylene-ethylene copolymer resin powder having an average particle size from 5 to 2500 microns with 0.5 to 500 ppm of a free radical initiator selected from the group consisting of organic peroxides, organic hydroperoxides and azo compounds at a temperature above the initiation temperature of the free radical initiator and below the melting point of the copolymer, said propylene-ethylene copolymers containing 55 to 99.5 wt. % propylene and 0.5 to 45 wt. % ethylene and selected from the group consisting of random copolymers, block copolymers and impact copolymers.