Extracting agents for poly-D(-)-3-hydroxybutyric acid
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United States of America Patent
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Nov 6, 1990
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N/A
app pub date -
Jun 22, 1989
filing date -
Jul 7, 1988
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Expired
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Abstract
Use of diols or acetalized triols, di- or tricarboxylic acid esters, mixtures of dicarboxylic acid esters or butyrolactone as extracting agents for obtaining pure polyesters or copolyesters containing 3-hydroxybutyric acid units.
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