Process for the purification of polycarbonate and polyester carb

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Treating polymer containing material or treating a solid...

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528198, 528480, C08F 600

Patent

active

054202418

ABSTRACT:
A process for purifying aromatic carbonate polymers, including polycarbonates and polyestercarbonates, is disclosed. Accordingly a carbonate polymer in an organic solvent is rendered virtually free of low molecular weight components by agitation with aluminosilicate or by passing through layers of such aluminosilicate. The aluminosilicate is subsequently separated off and the carbonate polymer is isolated in known methods.

REFERENCES:
patent: 4891421 (1990-01-01), Nishimura et al.
Organikum, Basic Organic Chemical Laboratory Course, 16th revised edition, VEB Deutscher Verlag der Wissenschaften, Berlin 1986, p. 650.
D. W. Breck in "Zeolite Molecular Sieves", Wiley Interscience, 1974, pp. 133-180.
Ullmanns Encyclopedia of Industrial Chemistry, 4th Edition, vol. 17, pp. 9-18. Verlag Chemie, Weinheim, New York.
Kirk-Othmer "Encyclopedia of Chemical Technology" 2nd Ed. 1964, vol. 5, pp. 541-561.

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