Isocyanato terminated precursor and method of making the same
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United States of America Patent
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Mar 16, 2010
Grant Date -
Feb 26, 2009
app pub date -
Aug 21, 2007
filing date -
Aug 21, 2007
priority date (Note) -
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Abstract
A method of making an isocyanato terminated precursor for polyurethane is disclosed. The method comprises heating an isocyanate containing about two or more isocyanato groups per molecule at a temperature of up to 80 degrees Celsius and at a pressure of about 1 atmosphere. The method further comprises mixing a modified vegetable oil comprising about two or more hydroxyl groups per molecule with the isocyanate at a molar equivalent ratio of at least 2:1 isocyanate to vegetable oil for a predetermined time period to form the isocyanato terminated precursor.
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