Method for producing polylactic acid
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United States of America Patent
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Jun 23, 1998
Grant Date -
N/A
app pub date -
Jul 11, 1996
filing date -
Jul 25, 1995
priority date (Note) -
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Abstract
A method for producing a polylactic acid, comprising the steps of carrying out a ring-opening polymerization of lactide to give polylactic acid, adding a compound capable of inactivating a catalyst for ring-opening polymerization of the lactide at the completion of the reaction, and removing unchanged lactide from the polylactic acid product by reducing pressure and/or allowing an inert gas to pass; and a method for forming fiber or film directly from the polylactic acid produced by the invention.
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