A process for the preparation of thermoplastic polyamide...

Details A process for the preparation of thermoplastic polyamide... A process for the preparation of thermoplastic polyamide...

C - Chemistry, Metallurgy

08

K

C08K 5/09 (2006.01) C08L 77/00 (2006.01)

Patent

CA 2570281

A process for preparing thermoplastic polyamide compositions that exhibit decreased melt flow and similar physical properties in comparison with conventional systems, in which polyamide is melt-blended with at least one organic acid, and, optionally, one or more additional components, such that the organic acid has a melting point that is no lower than about 10~ C less than the onset temperature of the melting point endotherm of the polyamide. The process results in decreased levels of corrosion and erosion of standard processing equipment in comparison with other processes for decreasing the melt flow while maintaining the physical properties of thermoplastic polyamide compositions. Articles of manufacture made according to the instant process and composition described therein are also disclosed.

L~invention porte sur un procédé de fabrication de compositions polyamides thermoplastiques présentant un écoulement de fusion réduit et des propriétés physiques similaires en comparaison avec les systèmes conventionnels, où le polyamide est mélangé en fusion avec au moins un acide organique et, en option, un ou plusieurs composants supplémentaires, de telle sorte que l~acide organique présente un point de fusion d~au moins 10° C inférieur à la température de départ de l~endotherme du point de fusion du polyamide. Le processus se traduit par des niveaux réduits de corrosion et d~érosion des équipements de traitement standard en comparaison avec d~autres processus pour réduire l~écoulement de fusion tout en maintenant les propriétés physiques des compositions polyamides thermoplastiques. L~invention porte également sur des articles de fabrication selon le procédé et la composition décrits ici.

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