Process for preparing a polymer having a 2,5-furandicarboxylate moiety within the polymer backbone and such (co)polymers
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United States of America Patent
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Feb 14, 2017
Grant Date -
Nov 17, 2011
app pub date -
Dec 30, 2009
filing date -
Dec 30, 2008
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Abstract
A process for preparing a polymer having a 2,5-furandicarboxylate moiety within the polymer backbone and having a number average molecular weight of at least 10,000 (as determined by GPC based on polystyrene standards) includes a first step where a prepolymer is made having the 2,5-furandicarboxylate moiety within the polymer backbone, followed in a second step by a polycondensation reaction. Polymers so produced may have a 2,5-furandicarboxylate moiety within the polymer backbone, and having a number average molecular weight of at least 20,000 (as determined by GPC based on styrene standards), and an absorbance as a 5 mg/mL solution in a dichloromethane:hexafluoroisopropanol 8:2 at 400 nm of below 0.05.
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