Solid-phase polymerization method for preparing high-molecular-weight aliphatic polyester
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United States of America Patent
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Mar 22, 2016
Grant Date -
Apr 10, 2014
app pub date -
May 28, 2012
filing date -
May 31, 2011
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Abstract
A solid-phase polymerization method of high-molecular-weight aliphatic polyester conducts the solid-phase polymerization of aliphatic polyester prepolymer under a gas stream containing sulfonic acid catalyst. The method features preparing metal free aliphatic polyester with high molecular weight, good color and luster and perfect thermal stability efficiently. The non-metal-ion aliphatic polyester is not only applicable to common use, but is also suitable as high value-added medical material and packing material which contacts with food directly than other metal-containing polyester.
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