Polyisocyanate based xerogels
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United States of America Patent
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May 16, 2000
Grant Date -
N/A
app pub date -
Mar 31, 1998
filing date -
Apr 1, 1997
priority date (Note) -
Expired
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Abstract
Process for making polyisocyanate based xerogels by trimerisation of an organic polyisocyanate in an organic solvent in the presence of a (co)polymer containing an isocyanate-reactive group, gellation and drying of the obtained sol-gel.
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