Isocyanate compositions for blown polyurethane foams
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United States of America Patent
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Jun 19, 2001
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N/A
app pub date -
Jun 11, 1998
filing date -
Jun 13, 1997
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Abstract
Rigid polyurethane foams are prepared from an isocyanate composition containing diphenylmethane diisocyanate, three ring oligomers of polyphenylene polymethylene polyisocyanate and higher homologues of polyphenylene polymethylene polyisocyanate.
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