Solutions of perfluorinated polymers in CO.sub.2

Details Solutions of perfluorinated polymers in CO.sub.2 Solutions of perfluorinated polymers in CO.sub.2

1995-09-15

1996-06-25

Michl, Paul R.

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524546, 528481, 528482, 528483, 528490, 528503, C08J 302, C08K 300, C08L 2304

Patent

active

055300499

ABSTRACT:
High melting point perfluorinated tetrafluoroethylene polymers dissolved in supercritical carbon dioxide at elevated temperatures and high pressures. The solutions are useful for making foams, spun-bonded or paper-like webs, or for purification of polymers.

REFERENCES:
J. M. DeSimone, et al., Synthesis of Fluoropolymers in Supercritical Carbon Dioxide, Science, 257, 945-947, 1992.
M. McHugh et al., Supercritical Fluid Extraction Principles and Practice, Butterworths, Boston, Chapter 9, pp. 156-163, 1986.
P. Smith, et al., Dissolution of Poly(Tetrafluoroethylene), Macromolecules 1993, 1222-1227.
McHugh, M. et al, Encyclopedia of Polymer Science & Engineering, 16, 368-399 (1985).
JP 50-49806(Abstract), `Derwent Publications Ltd., London, AN-93-111979[14], Mar. 2, 1993.
JP 50-49806 (Abstract), Patent Abstracts of Japan, vol. 17, No. 355; Jul. 6, 1993.

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