Treatment of polyamide with gas phase or acid, anhydride or...

Details Treatment of polyamide with gas phase or acid, anhydride or... Treatment of polyamide with gas phase or acid, anhydride or...

D - Textiles, Paper

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D06M 13/325 (2006.01) C08G 69/46 (2006.01) C08G 69/48 (2006.01) C08J 7/12 (2006.01) D01F 6/60 (2006.01) D06M 11/60 (2006.01) D06M 13/188 (2006.01) D06M 13/192 (2006.01) D06M 13/203 (2006.01) D06M 13/332 (2006.01) D06M 23/06 (2006.01)

Patent

CA 2415440

The end group content of polyamide in the solid state may be reduced b treating the polyamide with gas-phase acid, anhydride, or amine. Stain- or dye- resistant polyamide fibers can be made by reducing the number of amino end groups. Reduction in the number of carboxylic end groups reduces the rate of regeneration of starting monomers during extrusion.

La teneur en groupe terminaux d'un polyamide à l'état solide peut être réduite par un traitement du polyamide à l'aide d'une phase gazeuse d'acide, d'anhydride, ou d'amine. On peut produire des fibres de polyamide résistant aux taches ou aux colorants en réduisant le nombre de groupes terminaux amino. La réduction du nombre de groupes terminaux carboxyliques permet de réduire le taux de régénération de monomères de départ pendant l'extrusion.

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