Improved thermally stable flame retardant polyamides

C - Chemistry – Metallurgy – 08 – L

Patent

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Details

IPC codes

C08L 77/00 (2006.01) C08K 3/00 (2006.01) C08K 3/22 (2006.01) C08K 3/24 (2006.01) C08K 5/00 (2006.01) C08K 5/03 (2006.01) C08K 13/02 (2006.01) C08L 25/18 (2006.01)

Type

Patent

Patent number

CA 2321551

Description

Certain polyamide molding compositions are disclosed having improved flame resistance and heat stability. These compositions comprise in weight percent, 20-78 % polyamide having a melting point of 280-340 ~C; 10-60 % inorganic filler; 10-35 % flame retardant (brominated or chlorinated); 1-10 % antimony compound; 1-10 % of one or more oxides, hydroxides, or salts of weak mineral acids, and combinations thereof; and 0-2 % heat stabilizer.

Certaines compositions de moulage polyamide de cette invention présentent une meilleure résistance aux flammes et une meilleure stabilité thermique. Ces compositions comprennent, en pourcentage en poids, 20 à 78 % d'un polyamide dont le point de fusion est compris entre 280 et 340 ·C; 10 à 60 % d'une charge inorganique; 10 à 35 % d'un composé ignifuge (bromé ou chloré); 1 à 10 % d'un composé d'antimoine; 1 à 10 % d'un ou plusieurs oxydes, hydroxydes ou sels d'acides minéraux faibles, et des combinaisons de ceux-ci; et de 0 à 2 % d'un stabilisant thermique.

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