Carbocationic polymerizations in supercritical CO.sub.2

Details Carbocationic polymerizations in supercritical CO.sub.2 Carbocationic polymerizations in supercritical CO.sub.2

1993-11-10

1994-12-27

Schofer, Joseph L.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

5263487, 526347, 526339, C08F 204

Patent

active

053767446

ABSTRACT:
A process is disclosed for carbocationically polymerizing monomers having one or more carbon-carbon double bonds in a medium primarily of carbon dioxide at or above 31.1.degree. C. and at or above 73 bars pressure. The supercritical carbon dioxide can replace traditional solvents for carbocationic polymerizations. While traditional solvents like methylene chloride do not function to allow polymers to form above cryogenic temperatures, it has been found that polymers can be formed at higher temperatures in this supercritical medium.

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A section from a book entitled "Carbocationic Polymerization" by Joseph P. Kennedy, Institute of Polymer Science, The University of Akron, Akron, Ohio, and Ernest Marechal, Laboratorie de Synthese Macromoleculaire, Universite Pierre et Marie Curie, Paris, France, pp. 2-27, John Wiley & Sons.
A section from a book entitled "Principles of Polymerization," Second Edition, George Odian, Professor of Chemistry, The College of Staten Island, The City University of New York, Staten Island, N.Y., pp. 364-367, John Wiley & Sons.

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