Foamable composition using recycled or offgrade polypropylene

Details Foamable composition using recycled or offgrade polypropylene Foamable composition using recycled or offgrade polypropylene

2005-09-20

2005-09-20

Foelak, Morton (Department: 1711)

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

Synthetic resins

Process of treating scrap or waste product containing solid...

C521S134000, C521S139000, C525S098000, C525S191000, C525S240000

Reexamination Certificate

active

06946495

ABSTRACT:
A polymeric composition to be used in producing foam in which the polymeric composition comprises conventional linear polypropylene, high melt strength polypropylene and a rheology modifier resin. The conventional linear polypropylene is in an amount of from about 1 to 25 weight percent of the polymeric composition. The high melt strength polypropylene is in the amount of from about 51 to 85 weight percent of the polymeric composition. The rheology modifier resin is in the amount of from 5 to about 30 weight percent of the polymeric composition. The conventional linear polypropylene may be offgrade virgin polypropylene or recycled polypropylene from post-industrial or post-consumer sources. The rheology modifier resin is a member of the group of styrene-olefin copolymers.

REFERENCES:
patent: 5733980 (1998-03-01), Cozewith et al.

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