Thermoplastic rubbers and process for preparing same

Details Thermoplastic rubbers and process for preparing same Thermoplastic rubbers and process for preparing same

1979-03-01

1981-11-03

Michl, Paul R.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526125, C08F 1006

Patent

active

042987210

ABSTRACT:
Thermoplastic rubbers comprising propylene-ethylene copolymers containing from 50% to 90% by weight of propylene and showing, on X-rays examination in the unoriented state, crystallinity of the polypropylene and/or polyethylene type are disclosed.
Also disclosed is a method for preparing the thermoplastic rubbers by polymerizing mixtures of propylene and ethylene in the presence of a catalyst obtained by reacting.

REFERENCES:
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patent: 3378606 (1968-04-01), Kontos
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patent: 3789036 (1974-01-01), Longi
patent: 3803105 (1974-04-01), Calli
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patent: 3870690 (1975-03-01), Gordon
patent: 3875075 (1975-04-01), Boone
patent: 3888835 (1975-06-01), Ito
patent: 4013823 (1977-03-01), Longi

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