Flame resistant rubber modified polymer compositions

Details Flame resistant rubber modified polymer compositions Flame resistant rubber modified polymer compositions

C - Chemistry, Metallurgy

08

L

C08L 51/04 (2006.01) C08K 13/02 (2006.01) C08L 23/06 (2006.01) C08L 53/02 (2006.01)

Patent

CA 2236034

The present invention is a flame resistant resin composition comprising: a) from 50 to 90 parts by weight of a rubber modified polymer derived from a vinyl aromatic monomer, b) from 1 to 8 parts by weight of an impact modifier, c) from 0.5 to 5 parts by weight of a polyolefin having a density of greater than 0.940 g/cm3 and a melt flow rate of less than 4 as measured according to ASTM D1238 at 190 ~c using a 2.16 kg weight, d) a sufficient amount of a halogen-containing flame retardant to provide the composition with 7 to 14 parts by weight halogen, and e) from 2 to 6 parts by weight of an inorganic flame retardant synergist.

L'invention concerne une composition de résine ignifuge contenant: a) de 50 à 90 parties en poids d'un polymère modifié au caoutchouc dérivé d'un monomère aromatique de vinyle; b) de 1 à 8 parties en poids d'un modificateur d'impact; c) de 0,5 à 5 parties en poids d'une polyoléfine dont la densité est supérieure à 0,940 g/cm?3¿ et le débit de fusion inférieur à 4 tel qu'il a été mesuré en fonction de la norme ASTM D1238 à 190 ·C au moyen d'un poids de 2,16 kg; d) d'une quantité suffisante d'un ignifuge contenant halogène conférant à la composition 7 à 14 parties en poids d'halogène; e) de 2 à 6 parties en poids d'un agent synergique ignifuge inorganique.

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