Color stable flame retarded polyamide resin

C - Chemistry – Metallurgy – 08 – L

Patent

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Details

C08L 77/00 (2006.01) C08K 3/00 (2006.01) C08K 3/38 (2006.01)

Patent

CA 2264950

This invention relates to a process for improving the color stability of a polyamide resin by providing a molding composition comprising 20 to 80 weight percent of a polyamide having a melting point of from 280 °C to 340 °C; 0 to 50 weight percent of an inorganic filler; 10 to 35 weight percent of a flame retardant with 50-70 weight percent bromine, and 1 to 10 weight percent of an antimony compound, adding from 0.1 to 4 weight percent zinc borate to the molding composition. The above weight percents are based upon the total amount of polyamide, inorganic filler, flame retardant, antimony compound, and zinc borate only. Molding the molding composition to make a molded part is part of the invention.

La présente invention concerne un processus d'amélioration de la stabilité d'une couleur d'une résine polyamide présentant une composition de moulage comprenant 20 à 80 pour cent en poids d'un polyamide présentant un point de fusion allant de 280 DEG C à 340 DEG C, 0 à 50 pour cent en poids d'une charge inorganique, 10 à 35 en poids d'un agent ignifuge comportant 50-70 pour cent en poids de bromure et 1 à 10 pour cent en poids d'un composé d'antimoine apportant 0,1 à 4 pour cent en poids de borate de zinc à la composition de moulage. Les pourcentages en poids considérés sont établis uniquement sur la quantité totale de polyamide, de charge inorganique, d'agent ignifuge, de composé d'antimoine et de borate de zinc. L'invention concerne également le moulage de la composition de moulage permettant de réaliser une pièce moulée.

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