Flame-retardant polycarbonate resin composition, sheet and film using same, and manufacturing method for each
The present invention provides a polycarbonate resin composition characterized by containing 73 to 94.5 mass % of a polycarbonate resin (A), 5 to 25 mass % of a phosphorus-based flame retardant (B), and 0.1 to 2 mass % of a fluoropolymer (C), and by having a flow value of 1×0.01 to 10×0.01 cm 3 /sec at 280° C. The present invention also provides a sheet and a film using the polycarbonate resin composition.
1. A polycarbonate resin composition, which contains 73 to 94.5% by mass of a polycarbonate resin (A), 5 to 25% by mass of a phosphorus-based flame retardant (B) and 0.1 to 2% by mass of a fluoropolymer (C), the composition having a flow value of 1×0.01 to 10×0.01 cm 3 /sec at 280° C., wherein the polycarbonate resin (A) has a viscosity-average molecular weight of 40,000 to 50,000.
2. The polycarbonate resin composition according to claim 1 , wherein the phosphorus-based flame retardant (B) is a phosphazene compound or a condensed-type phosphoric acid ester.
3. The polycarbonate resin composition according to claim 1 , wherein the fluoropolymer (C) is a polymer or copolymer comprising a tetrafluoroethylene structure.
4. The polycarbonate resin composition according to claim 1 , which is for a sheet or film.
5. A sheet or film, wherein the polycarbonate resin composition according to claim 1 is used.
6. The sheet or film according to claim 5 , which has a thickness of 10 to 1000 μm.
7. A method for producing a sheet or film, which comprises extrusion molding the polycarbonate resin composition according to claim 1 .
8. The polycarbonate resin composition according to claim 1 , wherein the molecular weight distribution of the polycarbonate resin and any carbonate oligomer in the composition is from 2.0 to 3.0.
9. The polycarbonate resin composition according to claim 1 , in which the polycarbonate resin (A) is the only polycarbonate resin in the composition.