Process and device for extracting polyamide

A process for removing low molecular weight constituents from polyamide 6 or from copolyamides based on caprolactam (herein (co)polyamide) is disclosed. The process comprise subjecting the (co)polyamide to liquid-extraction at a temperature which is above the boiling point of the liquid at atmospher...

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Bibliographic Details
Main Authors Haupt, Heinrich, Gobbels, Dieter, Triebeneck, Konrad, Gittinger, Andreas
Format Patent
LanguageEnglish
Published 02.01.2003
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Summary:A process for removing low molecular weight constituents from polyamide 6 or from copolyamides based on caprolactam (herein (co)polyamide) is disclosed. The process comprise subjecting the (co)polyamide to liquid-extraction at a temperature which is above the boiling point of the liquid at atmospheric pressure said liquid containing water in an amount of at least 80 percent relative to its weight .