Flameproofed impact-strength-modified poly(ester)carbonate compositions
First Claim
1. A thermoplastic composition comprisingA) 40-95 parts by weight of branched aromatic polycarbonate and/or aromatic poly(ester)carbonate,B) 1-25 parts by weight of a graft polymer including at least one graft base selected from the group consisting of silicone rubber and silicone-acrylate rubber,C) 9-18 parts by weight of talc,D) 0.4-20 parts by weight of phosphorus-containing flameproofing agent,E) 1-6 parts by weight of at least one inorganic boron compound selected from the group consisting of Zn4B2O7.H2O, Zn2B6O11.3.5H2O and ZnB4O7.4H2O, andF) 0-3 parts by weight of an anti-dripping agent.
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Accused Products
Abstract
A poly(ester)carbonate compositions characterized by its flame resistance and high impact strength is disclosed. The composition that contains
- branched aromatic poly(ester)carbonate, a graft polymer wherein the graft base is silicone rubber or silicone-acrylate rubber, talc, phosphorus-containing flameproofing agent, and an inorganic boron compound, and
- an optional anti-dripping agent
satisfies enhanced fire-protection requirements.
30 Citations
15 Claims
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1. A thermoplastic composition comprising
A) 40-95 parts by weight of branched aromatic polycarbonate and/or aromatic poly(ester)carbonate, B) 1-25 parts by weight of a graft polymer including at least one graft base selected from the group consisting of silicone rubber and silicone-acrylate rubber, C) 9-18 parts by weight of talc, D) 0.4-20 parts by weight of phosphorus-containing flameproofing agent, E) 1-6 parts by weight of at least one inorganic boron compound selected from the group consisting of Zn4B2O7.H2O, Zn2B6O11.3.5H2O and ZnB4O7.4H2O, and F) 0-3 parts by weight of an anti-dripping agent.
Specification