Patent ID: 8138256

Claim:
A flame-retardant resin composition comprising a polycarbonate type resin and fly ash which contains particles composed of a complex of silicon dioxide and aluminum oxide and has a 50% particle size (D50) of 1 to 10 μm and has two peaks in its particle size distribution, wherein the peak corresponding to the particle size distribution of larger particles is greater than the peak corresponding to the particle size distribution of smaller particles, the ratio of the average particle size of the peak corresponding to the particle size distribution of larger particles to the average particle size of the peak corresponding to the particle size distribution of smaller particles is less than or equal to 10.0, and the amount of the fly ash containing particles having particle size of 20 μm or less is 70 weight % or more, wherein the fly ash is contained in the total composition in an amount of 1 to 60 weight %, and wherein the flame-retardant resin composition has a flame retardancy of V-0 in the UL94V method.