High melt flow propylene impact copolymer and method

Details High melt flow propylene impact copolymer and method High melt flow propylene impact copolymer and method

2009-02-23

2011-11-29

Cheung, William (Department: 1762)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymerizing in two or more physically distinct zones

C526S348000, C525S240000

Reexamination Certificate

active

08067510

ABSTRACT:
The present disclosure provides a polymerization process for the production of a high melt flow propylene impact copolymer. The process includes contacting an active propylene-based polymer having a melt flow rate greater than about 100 g/10 min with one or more olefins in a polymerization reactor to form the propylene impact copolymer with a melt flow rate greater than about 60 g/10 min. The production of the high melt flow propylene impact copolymer may occur in one or more polymerization reactors, utilizing standard hydrogen concentration, and no visbreaking.

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