Impact resistant, flame retardant thermoplastic molding...

C - Chemistry – Metallurgy – 08 – L

Patent

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C08L 69/00 (2006.01) C08K 5/5373 (2006.01) C08L 27/18 (2006.01) C08L 51/04 (2006.01) C08L 51/06 (2006.01)

Patent

CA 2725824

A thermoplastic molding composition characterized by its flame retardance and impact strength is disclosed. The composition contains (A) linear aromatic (co)polycarbonate, (B) a graft (co)polymer having a grafted phase containing the polymerization product of at least one vinyl monomer and a substrate in particulate form that contains crosslinked member selected from the group consisting of (i) rubber containing interpenetrated and inseparable silicone and poly(meth)alkyl acrylate components and (ii) silicone rubber, (C) a phosphorous-containing flame retardant compound, (D) fluorinated polyolefin. The composition containing neither polyalkylene terephthalate nor boron compounds.

Linvention concerne une composition de moulage thermoplastique caractérisée par sa résistance aux flammes et sa résistance aux impacts. La composition contient (A) un (co)polycarbonate aromatique linéaire, (B) un (co)polymère greffé contenant une phase greffée qui contient le produit de polymérisation dau moins un monomère de vinyle et un substrat sous forme particulaire qui contient un élément réticulé choisi dans le groupe constitué de (i) un caoutchouc contenant des composants de silicone et de poly(méth)acrylate dalkyle interpénétrés et inséparables et (ii) un caoutchouc de silicone, (C) un composé ignifuge contenant du phosphore, (D) une polyoléfine fluorée. La composition ne contient ni du téréphtalate de polyalkylène, ni des composés de bore.

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