Method for preparing biodegradable polyester copolymer
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United States of America Patent
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Oct 11, 2016
Grant Date -
Oct 22, 2015
app pub date -
Jul 30, 2013
filing date -
Nov 21, 2012
priority date (Note) -
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Abstract
The present invention provides a method of preparing a polyester-based polymer and a polyester-based polymer prepared by the method. The method of preparing the polyester-based polymer includes a prepolymerization step of polymerizing a dicarboxylic acid compound (A), a diol compound (B), and an aromatic branching agent (C) at 160-220° C. to produce a prepolymer; and a condensation polymerization step of performing a condensation polymerization of the prepolymer at 200-250° C., under a vacuum pressure of 0.1 to 2 Torr.
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