Impact resistant, flame retardant thermoplastic molding composition

摘要

A thermoplastic molding composition characterized by its flame retardance and impact strength is disclosed. The composition contains A) 70 to 99 parts by weight of aromatic poly(ester) carbonate B) 1 to 30 parts by weight of polyalkylene terephthalate, the total weight of A) and B) being 100 parts resin, and C) 1 to 20 parts per hundred parts resin (phr) of graft (co)polymer having a core-shell morphology, including a grafted shell that contains polymerized alkyl(meth)acrylate and a composite rubber core that contains interpenetrated and inseparable polyorganosiloxane and poly(meth)alkyl acrylate components, D) 2 to 20 phr of a phosphorous-containing compound, and E) 0.1 to 2 part by weight of fluorinated polyolefin.

主权项

1. A thermoplastic molding composition comprising:
A) 70 to 85 parts by weight of aromatic poly(ester) carbonate; B) 15 to 30 parts by weight of polyalkylene terephthalate; wherein the weight of A) and B) totals 100 parts resin; C) 1 to 20 parts per hundred parts resin (phr) of graft (co)polymer having a core-shell morphology, including a grafted shell that contains polymerized alkyl(meth)acrylate and a composite rubber core that contains interpenetrated and inseparable polyorganosiloxane and poly(meth)alkyl acrylate components, wherein said core is in the form of particles having median particle size of 0.05 to 5 microns and glass transition temperature below 0° C., and wherein weight ratio of polyorganosiloxane/poly(meth)alkylacrylate/rigid shell is about 80 parts polyorganosiloxane, about 10 parts poly(meth)alkylacrylate, and about 10 parts rigid shell; D) 2 to 20 phr of a phosphorous-containing compound; and E) 0.1 to 2 parts by weight of a fluorinated polyolefin; wherein component B is present at a level of greater than 10% by weight of the thermoplastic molding composition.