Process for improving characteristics of a polyamide

Details Process for improving characteristics of a polyamide Process for improving characteristics of a polyamide

C - Chemistry, Metallurgy

08

G

C08G 69/48 (2006.01) D06M 13/395 (2006.01) D06P 1/642 (2006.01) D06P 3/24 (2006.01) D06P 5/22 (2006.01)

Patent

CA 2403538

A process for improving characteristics such as, whiteness retention, degradation, and dyeability of a polyamide by contacting the polyamide with thiocyanate. A polyamide produced by the process has improved dyed color depth, dyed color uniformity, hue, elimination of light dyeing ends, protection of dye sites from degradation, protection from UV degradation, reduced yellowing or oxidation, and/or resistance to loss of dyeability.

L'invention concerne un procédé permettant d'améliorer des caractéristiques telles que la persistance de la blancheur, la dégradation et l'aptitude à la teinture d'un polyamide en plaçant le polyamide en contact avec le thiocyanate. Un polyamide produit selon ce procédé présente des caractéristiques améliorées en ce qui concerne la profondeur de couleur de la teinture, l'uniformité de la couleur teinte, la teinte, l'élimination des extrémités de teintures claires, la protection des sites de teinture contre la dégradation, la protection contre la dégradation par les UV. En outre, il présente une réduction du jaunissement ou de l'oxydation, et/ou une résistance à la perte de l'aptitude à la teinture.

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