Blocked polyisocyanates, a process for their preparation, and their use
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United States of America Patent
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Dec 26, 2000
Issued Date -
N/A
app pub date -
Sep 28, 1999
filing date -
Jul 4, 1996
priority date (Note) -
Expired
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Abstract
Partially or totally blocked polyisocyanates comprising physical mixtures of individual a) urethane-functional and/or b) biuret-functional and/or c) isocyanurate-functional aliphatic and (cyclo)aliphatic and/or cycloaliphatic diisocyanate whose isocyanate groups are blocked in such a way that there is from 0.5 to 1 mol, preferably from 0.8 to 1 mol, of 1,2,4-triazole per isocyanate equivalent.
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