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Poly(ethylene oxide) functionalization

United States Patent

April 8, 2014
View the Complete Patent at the US Patent & Trademark Office
A simple procedure is provided by which the hydroxyl termini of poly(ethylene oxide) can be appended with functional groups to a useful extent by reaction and precipitation. The polymer is dissolved in warmed toluene, treated with an excess of organic base and somewhat less of an excess of a reactive acylating reagent, reacted for several hours, then precipitated in isopropanol so that the product can be isolated as a solid, and salt byproducts are washed away. This procedure enables functionalization of the polymer while not requiring laborious purification steps such as solvent-solvent extraction or dialysis to remove undesirable side products.
Pratt; Russell Clayton (Foster City, CA)
Seeo, Inc. (Hayward, CA)
13/ 251,246
October 1, 2011
STATEMENT OF GOVERNMENT SUPPORT The invention described and claimed herein was made in part utilizing funds supplied by the U.S. Department of Energy under Contract No. DE-OE0000223. The Government has certain rights in this invention.