US Patent 5,270,421
United States Patent and Trademark Office
University of Iowa Research Foundation (Iowa City, IA, US)
A method of making a novel sugar-based polymer is disclosed. A sugar and an organic acid derivative having at least two carboxylate functionalities are mixed in a substantially non-aqueous organic solvent with a hydrolytic enzyme and, thereafter, the resulting mixture is agitated for a time sufficient to allow for the polymerization of the sugar. The resulting sugar-based polymer has sugar incorporated in the polymer backbone.
Dordick, Jonathan S.; Rethwisch, David G.; and Patil, Damodar R. Sugar-based polymers. US Patent 5,270,421 filed July 22, 1992 and issued December 14, 1993. https://ir.uiowa.edu/patents/112