Extraction of residues from styrenic polymers

Details Extraction of residues from styrenic polymers Extraction of residues from styrenic polymers

1985-12-23

1987-10-27

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, C08F 600, C08F 628, C08J 300

Patent

active

047031050

ABSTRACT:
Bringing polymerizates, particularly those comprising styrene polymerized with an equal amount or more acrylonitrile and containing free styrene and acrylonitrile monomers, into contact with carefully selected gases in the near-critical to supercritical state substantially inhibits depolymerization and decomposition while substantially improving residue extraction.

REFERENCES:
patent: 4061566 (1977-12-01), Moddell
Braun, CA 102:25330v, p. 25335 (1984).
"Hackh's Chem. Dictionary", J. Grant (ed.), McGraw-Hill, N.Y. (1969), p. 281.
Translation of Ger. Offen. 3,323,940 to Braun et al.

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