Polyhydroxycarboxylic acid and preparation process thereof
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United States of America Patent
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May 10, 1994
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N/A
app pub date -
Dec 18, 1992
filing date -
Dec 19, 1991
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Abstract
A process for preparing polyhydroxycarboxylic acid by conducting a dehydration condensation of a hydroxycarboxylic acid or an oligomer thereof in a reaction mixture containing an organic solvent substantially in the absence of water and the polyhydroxycarboxylic acid thus obtained. The process provides polyhydroxycarboxylic acid having excellent properties and processability.
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