Patent ID: 8252858

Claim:
A thermoplastic composition, comprising: 52.8 to 78.2 weight percent of a poly(2,6-dimethyl-1,4-phenylene ether) having an intrinsic viscosity of 0.33 to 0.46 deciliter per gram, measured at 25° C. in chloroform; 4.9 to 15 weight percent of a rubber-modified polystyrene; 4.86 to 9.5 weight percent of a polystyrene-polybutadiene-polystyrene triblock copolymer; 4.86 to 15.2 weight percent of an organophosphate ester flame retardant selected from the group consisting of bisphenol A bis(diphenyl phosphate), resorcinol bis(diphenyl phosphate), and mixtures thereof; 2.8 to 4.7 weight percent of a functionalized polysiloxane comprising alkoxy substituents and aminoalkyl substituents comprising at least one primary or secondary amine; wherein the functionalized polysiloxane has a viscosity at 23° C. of 10 to 200 centistokes; and 0.46 to 1.43 weight percent of an organic acid selected from the group consisting of citric acid, fumaric acid, succinic acid, and maleic anhydride; wherein the thermoplastic composition comprises less than 0.5 weight percent of polyamide; wherein all weight percents are based on the total weight of the thermoplastic composition; and wherein the thermoplastic composition has at least one smoke density property selected from the group consisting of a smoke density at four minutes of 5 to 250 as determined by ASTM E662 at a sample thickness of 1.5 to 3.2 millimeters, and a corrected maximum smoke density of 20 to 300 in the initial 20 minutes as determined by ASTM E662 at a sample thickness of 1.5 to 3.2 millimeters.