Process and device for extracting polyamide
The present invention provides a process and a device for removing low molecular weight constituents from polyamide 6 or from copolyamides based on caprolactam (herein (co)polyamides) by extraction. A process for removing low molecular weight constituents from polyamide 6 or from copolyamides based...
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Main Authors | , , , |
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Format | Patent |
Language | English |
Published |
02.03.2004
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Online Access | Get full text |
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Summary: | The present invention provides a process and a device for removing low molecular weight constituents from polyamide 6 or from copolyamides based on caprolactam (herein (co)polyamides) by extraction.
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. |
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