Impact copolymer compositions

Details Impact copolymer compositions Impact copolymer compositions

1992-01-16

1993-11-02

Seidleck, James J.

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

Synthetic resins

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

525240, 525242, 525245, 525268, 525322, 525324, 5253317, 5253337, 525387, C08L 2310, C08L 2326

Patent

active

052584640

ABSTRACT:
Polypropylene impact copolymer compositions demonstrate not only good low temperature properties, including impact strength, but also resistance to stress whitening when the numerical ratio of the intrinsic viscosity of the copolymer phase to the intrinsic viscosity of the homopolymer phase is near unity and ethylene contents of the copolymer phase are in the range of 38% to 60% by weight. The impact copolymer compositions are useful in the production of molded and extruded articles, shaped containers, and films having good clarity.

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