ACID NUMBER REDUCTION AND HYDROLYSIS STABILIZATION OF BIO-BASED POLYESTER POLYOL COMPOSITIONS
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United States of America Patent
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Issued Date -
Jun 30, 2011
app pub date -
Aug 14, 2009
filing date -
Aug 20, 2008
priority date (Note) -
Abandoned
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Abstract
The present invention provides polyester polyol compositions stabilized against hydrolysis and having a reduced acid number, namely, compositions comprising sterically hindered aromatic carbodiimides, the processes of making such compositions, a process for stabilizing against hydrolysis and/or reducing the acid number of polyester polyol compositions, and to the above wherein the polyols are bio-based polyester polyols such as soybean or castor oil based polyols.
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