Process for producing modified, impact-resistant polyamides with lactam-blocked diisocyanate/monoisocyanate
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United States of America Patent
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Jul 10, 1990
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N/A
app pub date -
Jul 11, 1989
filing date -
Jul 11, 1988
priority date (Note) -
Expired
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Abstract
A process for producing modified, impact-resistant polyamides showing an increased polymerization rate, which consists in polymerizing an .omega.-lactam in the presence of: (a) a mixture of an organic di-isocyanate and an organic mono-isocyanate, the isocyanate groups of both of which are blocked with an .omega.-lactam; (b) a poly-oxy-alkylene-amine having an aminic functionality lower than 3, and (c) an alkaline catalyst.
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