Halogen-free polycarbonate compositions and articles formed therefrom
AssigneeGeneral Electric Company
InventorsHua Jiao, Yegang Lin, Rajendra Singh, Mahari Tjahjadi, Jingwu Yang, XinMin Yang
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Abstract
A halogen-free polycarbonate composition is disclosed having improved fire-retardancy and/or transparency characteristics. The composition comprises a polycarbonate, and a synergic combination of an aromatic sulfone sulfonate such as potassium diphenylsulfone sulfonate, an aromatic sulfonate such as sodium salt of toluene sulfonic acid, and optionally a siloxane oligomer. The polycarbonate composition is useful for manufacture of electronic and mechanical parts, among others.
Claims40
A flame retardant composition comprising (i) 100 parts by weight of polycarbonate;
- (ii) from about 0.0001 parts to about 0.2 parts by weight of an aromatic sulfone sulfonate;
- (iii) from about 0.002 parts to about 0.2 parts by weight of an aromatic sulfonate;
- (iv) optionally from about 0.05 parts to about 2 parts by weight of a siloxane oligomer, wherein a molded sample of the composition is able to achieve a UL 94 V0 rating at a thickness of 3.0 mm.
A flame retardant article molded from a composition comprising an effective amount of a polycarbonate, an aromatic sulfone sulfonate, an aromatic sulfonate, and, optionally, a siloxane oligomer to exhibit a UL 94 V0 flammability rating at 3.0 mm or less.
A flame retardant composition comprising (i) 100 parts by weight polycarbonate, wherein the polycarbonate comprises repeating structural units of the formula (A-2)
- wherein Xa is cyclohexane and Ra and Rb are each methyl, and p and q are each 1;
- (ii) from about 0.0001 parts to about 0.2 parts by weight of an aromatic sulfone sulfonate;
- (iii) from about 0.002 to about 0.2 parts by weight of an aromatic sulfonate, wherein a molded sample of the composition is able to achieve a UL94 V0 rating at a thickness of 3.0 mm.
Dependencies are inferred from the claim text.