PROCESS FOR THE PREPARATION OF POLYHYDROXYCARBOXYLIC ACID
摘要
<p>The present invention provides a process for producing polyhydroxycarboxylic acids having a weight-average molecular weight of 50,000 or above and excellent properties as biodegradable plastics by subjecting hydroxycarboxylic acids or oligomers thereof to polycondensation in the presence of an inorganic solid acid catalyst and a Lactide.</p>
