Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Tilman Sirch0
Alexander Wartini0
Matthias Dernbach0
Gerlinde Tischer0
Date of Patent
July 10, 2007
0Patent Application Number
105128510
Date Filed
May 21, 2003
0Patent Primary Examiner
Patent abstract
The invention provides a process for preparing polyester polyols of polyhydric alcohols by mono- or polyesterification of at least one carboxylic acid having at least two acid groups and/or at least one derivative of a dicarboxylic acid with polyhydric alcohols, optionally with the addition of a catalyst, while removing the water of reaction, wherein the polyhydric alcohol used has a formaldehyde acetal content of less than 500 ppm.
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