Method for the manufacture of polyesters
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United States of America Patent
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Jul 10, 2007
Grant Date -
Mar 30, 2006
app pub date -
Sep 27, 2005
filing date -
Sep 28, 2004
priority date (Note) -
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Abstract
A method is described for the manufacture of polyesters of aromatic dicarboxylic acids with aliphatic and/or cycloaliphatic dials, in which an aromatic dicarboxylic acid in the presence of a monocarboxylic acid or a mixture of a monocarboxylic acid present in a saturated solution with water or another suitable solvent is converted with an aliphatic or cycloaliphatic dial to a dicarboxylic acid alkanediolestercarboxylate and/or its oligomers, which are polycondensed in further process steps to the polyester.
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