Polypropylene copolymer alloys and process for making

Details Polypropylene copolymer alloys and process for making Polypropylene copolymer alloys and process for making

1997-03-04

1999-11-30

Marquis, Melvyn I.

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

Synthetic resins

Polymerizing in two or more physically distinct zones

525240, 526348, C08F 204, C08F 234

Patent

active

059944820

ABSTRACT:
The present invention relates to polypropylene alloys which are especially suited for soft fiber and fabric applications. An embodiment of these alloys comprise an ethylene-propylene random copolymer having an ethylene content of from about 1.0 to 5.0% by weight, in an amount of from about 40 to 90% by weight of the alloy; and an ethylene-propylene bipolymer having an ethylene content of from about 10 to 30% by weight, in an amount of from about 10 to 60% by weight of the alloy. The present invention further relates to a hybrid process for making these alloys.

REFERENCES:
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patent: 5023300 (1991-06-01), Huff et al.
patent: 5078935 (1992-01-01), Kobayashi et al.
patent: 5210139 (1993-05-01), Huff et al.
patent: 5449738 (1995-09-01), Koura et al.
Floor, John E., Shell Development Company, Gas Phase Random Copolymers For Polypropylene Film Applications, Polyolefins VII, Feb., 1991, Houston, Texas, pp. 309-333.

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