Process for purifying a rubber

Details Process for purifying a rubber Process for purifying a rubber

1986-04-07

1988-02-16

Schofer, Joseph L.

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

Synthetic resins

Treating polymer containing material or treating a solid...

528490, 528498, 528503, 210774, C08F 600, C08F 624

Patent

active

047256672

ABSTRACT:
The invention relates to a process for purifying ethylene-alkene-diene rubbers by extraction with an extractant chosen from substances with a critical temperature below 435.degree. K. at a temperature above the critical temperature of the extractant and a pressure above the critical pressure of the extractant.

REFERENCES:
patent: 2953557 (1960-09-01), Wride et al.
patent: 3378467 (1968-04-01), Colton et al.
patent: 4061566 (1977-12-01), Modell
patent: 4695621 (1987-09-01), Allada
Translation of German Offen. No. 3,323,940 to Braun et al., laid open Jan. 1, 1985.
Billmeyer, "Textbook of Polymer Science", Wiley--Interscience, N.Y. (1971) pp. 235-236.

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