Enzyme-catalyzed polycondensations

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof

Reexamination Certificate

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C252S175000, C424S417000, C424S490000, C510S228000

Reexamination Certificate

active

06972315

ABSTRACT:
A method for enzymatic condensation polymerization by combining a preselected quantity of an enzyme, a diol and/or a polyol, and a diacid in a reaction vessel; heating the reaction vessel containing the enzyme, the diol or polyol, and the diacid to a preselected temperature; and maintaining the reaction vessel containing the enzyme, the diol and/or polyol, and the diacid at the preselected temperature for a preselected time, thereby producing a condensation polymer.

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patent: 6225372 (2001-05-01), Lykke et al.
patent: WO 94/12652 (1994-06-01), None
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Kim and Dordick, Combinatorial Array-Based Enzymatic Polyester Synthesis, Biotechnol. Bioeng. 76(3), 200 (2001).
Uyama et al., Regioselective Polymerization of Sorbitol and Divinyl Sebacate using Lipase Catalyst, Chem. Lett. 800 (2000).
Uyama et al., Regioselective Polymerization of Divinyl Sebacate and Triols using Lipase Catalyst, Macromol. Rapid Commun. 20, 171 (1999).

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