Enzyme-catalyzed polycarbonate and polycarbonate ester...

Details Enzyme-catalyzed polycarbonate and polycarbonate ester... Enzyme-catalyzed polycarbonate and polycarbonate ester...

2011-05-31

2011-05-31

Boykin, Terressa M (Department: 1765)

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

Synthetic resins

From carboxylic acid or derivative thereof

C435S135000, C525S439000, C528S271000, C528S272000

Reexamination Certificate

active

07951899

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.

REFERENCES:
patent: 2008/0064827 (2008-03-01), Eipper et al.
patent: 2009/0047717 (2009-02-01), Gross et al.

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