Enzyme-catalyzed polycarbonate and polycarbonate ester synthesis
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United States of America Patent
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May 31, 2011
Grant Date -
Feb 18, 2010
app pub date -
Aug 15, 2008
filing date -
Aug 15, 2008
priority date (Note) -
Expired
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Abstract
An enzymatic process for preparing aliphatic polycarbonates via terpolymerization or transesterification using a dialkyl carbonate, an aliphatic diester, and an aliphatic diol or triol reactant. A catalyst having an enzyme capable of catalyzing an ester hydrolysis reaction in an aqueous environment is subsequently added to the reaction mixture. Next, polymerization of the reaction proceeds for an allotted time at a temperature ≦100° C. Finally, the copolymer is isolated from an the catalyst via filtration.
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