Polymer compositions

Details Polymer compositions Polymer compositions

1991-10-01

1993-10-05

Seccuro, Jr., Carman J.

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

Synthetic resins

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

525323, 525240, 525194, 525 53, C08L 2310, C08L 2326, C08L 2318, C08F29708

Patent

active

052506312

ABSTRACT:
Polypropylene impact copolymer compositions and visbroken derivatives thereof demonstrate a good balance of low temperature properties and resistance to stress whitening when the homopolymer phase is at least predominantly homopolymeric polypropylene and the rubber phase comprises a major proportion of ethylene with a minor proportion of .alpha.-olefin of at least 4 carbon atoms and a minor proportion of propylene.

REFERENCES:
patent: 3562790 (1971-02-01), Coover et al.
patent: 4334040 (1982-06-01), Fujii et al.
patent: 4454306 (1984-06-01), Fujii et al.
patent: 4535125 (1985-08-01), McCullough
patent: 4734459 (1988-03-01), Cecchin et al.

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