Polycarbonate compositions and articles formed therefrom
AssigneeGeneral Electric Company
InventorsJing Chen, Hua Jiao, Yegang Lin, Jingwu Yang, XinMin Yang
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Abstract
A composition is disclosed having minimum halogen content, fire-retardance and/or drip-resistant characteristics. The composition comprises an effective amount of a polycarbonate, a glass fiber, a polysiloxane-polycarbonate copolymer, and a synergistic combination of an aromatic sulfone sulfonate such as potassium diphenylsulfone sulfonate with an aromatic sulfonate such as sodium salt of toluene sulfonic acid, optionally in the presence of an anti-drip agent. The polycarbonate composition is useful for manufacture of electronic and mechanical articles, among others.
Claims23
A flame retardant composition comprising (i) 100 parts by weight of a polycarbonate;
- (ii) from about 5 parts to about 40 parts by weight of glass fibers;
- (iii) from about 5 parts to about 30 parts by weight of a polysiloxane-polycarbonate copolymer;
- (iv) from about 0.0001 parts to about 0.2 parts by weight of an aromatic sulfone sulfonate;
- (v) from about 0.002 parts to about 0.5 parts by weight of an aromatic sulfonate;
- and (vi) optionally from about 0.01 parts to about 0.3 parts by weight of an anti-drip agent, wherein a molded sample of the composition is able to achieve a UL 94 V0 rating at a thickness of 1.6 mm.
A flame retardant article molded from a composition comprising an effective amount of a polycarbonate, a glass fiber, a polysiloxane-polycarbonate copolymer, an aromatic sulfone sulfonate;
- an aromatic sulfonate and, optionally, an anti-drip agent, to produce a UL 94 flammability rating at 1.6 mm of V0.
A flame retardant article molded from a composition comprising an effective amount of a polycarbonate, a glass fiber, a polysiloxane-polycarbonate copolymer, an aromatic sulfone sulfonate;
- an aromatic sulfonate and, optionally, an anti-drip agent, to produce a UL 94 flammability rating at 1.2 mm of V0.
Dependencies are inferred from the claim text.