Polyolefin composition with improved impact properties

Details Polyolefin composition with improved impact properties Polyolefin composition with improved impact properties

2005-01-11

2005-01-11

Seidleck, James J. (Department: 1711)

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C525S192000, C525S193000, C525S197000, C525S212000, C525S240000, C525S261000, C525S331800, C525S333900, C525S349000, C525S351000, C525S352000

Reexamination Certificate

active

06841620

ABSTRACT:
The present invention includes a composition comprising a coupled impact propylene copolymer. Preferably, the coupled impact propylene copolymer has an elastomeric phase that is present in an amount of at least 9 weight percent of the coupled propylene copolymer. Articles formed from the coupled propylene copolymer exhibit improved directionally balanced impact properties as compared with articles formed form comparable noncoupled impact propylene copolymers and also exhibit improved ductile-to-brittle transition temperatures compared with comparable noncoupled impact propylene copolymers. The invention also includes methods for making the coupled impact propylene copolymers using coupling agents, preferably, poly(sulfonyl azides). The invention further includes articles of manufacture that are made from the coupled impact propylene copolymer of the invention.

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