Process for the preparation of elastomeric polypropylenes

Details Process for the preparation of elastomeric polypropylenes Process for the preparation of elastomeric polypropylenes

1994-05-19

1997-01-21

Weber, Thomas R.

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

Synthetic resins

Treating polymer containing material or treating a solid...

528493, C08F 624

Patent

active

055960766

ABSTRACT:
Process for the preparation of elastomeric, non-agglomerated, powdery/crumbly polypropylene by polymerization of propylene, if appropriate together with other olefins as comonomers, in liquid propylene and subsequent precipitation of the polypropylenes formed with CO.sub.2 or a polar solvent of which the polar term "delta p" of the solubility parameter according to Hansen is greater than 5 and the total solubility parameter "delta" is less than 30.

REFERENCES:
patent: 3454545 (1969-07-01), Scoggin
patent: 3932307 (1976-01-01), Setterquist
patent: 4211863 (1980-07-01), McDaniel et al.
patent: 4335225 (1982-06-01), Collette et al.
patent: 5232993 (1993-08-01), Winter et al.
Chemical Abstracts 85:33988m (1976).

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