Polymerization of lactam polyisocyanate having the isocyanate groups blocked with lactam
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United States of America Patent
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Jul 3, 1990
Grant Date -
N/A
app pub date -
Jan 10, 1989
filing date -
Jan 11, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Process of preparing modified polyamides endowed with improved mechanical properties, which process resides in polymerizing an .omega.-lactam in the presence of (a) a polyisocyanate having the isocyanate groups blocked by an .omega.-lactam, (b) a poly-oxy-alkylene-amine, and (c) an alkali metal catalyst. A further object of the invention is the products obtained by means of such a process.
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