Polycarbonate resin compositon and molded article

Abstract

Provided are a polycarbonate resin composition which does not contain halogen and phosphorus as a flame retardant component and which is excellent in a fluidity while maintaining a flame resistance, a heat resistance and an impact resistance and a molded article thereof. The polycarbonate resin composition comprises (A) 60 to 97 mass % of an aromatic polycarbonate resin composition and 3 to 40 mass % of (B) an acrylonitrile-styrene base resin having a melt flow rate (MFR) of 5 or more at 200° C. and a load of 5 kg, wherein it is blended with 0 to 37 mass parts of (C) an impact resistance-improving agent, 0 to 3 mass parts of (D) an organic alkali metal salt and/or an organic alkali earth metal salt, 0 to 3 mass parts of (E) a functional group-containing silicone compound, 0 to 55 mass parts of (F) an inorganic filler and 0 to 2 mass parts of (G) a polyfluoroolefin resin each per total 100 mass parts of (A) and (B).

1 . A polycarbonate resin composition comprising (A) 60 to 97 mass % of an aromatic polycarbonate resin and 3 to 40 mass % of (B) an acrylonitrile-styrene base resin having a melt flow rate (MFR) of 5 or more at 200° C. and a load of 5 kg, wherein it is blended, if necessary, with 0 to 37 mass parts of (C) an impact resistance-improving agent, 0 to 3 mass parts of (D) an organic alkali metal salt and/or an organic alkali earth metal salt, 0 to 3 mass parts of (E) a functional group-containing silicone compound, 0 to 55 mass parts of (F) an inorganic filler and 0 to 2 mass parts of (G) a polyfluoroolefin resin each per total 100 mass parts of (A) and (B).  
   
   
       2 . The polycarbonate resin composition as claimed in  claim 1 , wherein the acrylonitrile-styrene base resin has a melt flow rate (MFR) of 15 or more at 200° C. and a load of 5 kg.  
   
   
       3 . The polycarbonate resin composition as claimed in  claim 1 , wherein the acrylonitrile-styrene base resin has a melt flow rate (MFR) of 30 or more at 200° C. and a load of 5 kg.  
   
   
       4 . The polycarbonate resin composition as claimed in  claim 1 , wherein the aromatic polycarbonate resin is a polyorganosiloxane-containing aromatic polycarbonate resin.  
   
   
       5 . The polycarbonate resin composition as claimed in  claim 4 , wherein polyorganosiloxane of the polyorganosiloxane-containing aromatic polycarbonate resin is polydimethylsiloxane.  
   
   
       6 . The polycarbonate resin composition as claimed in  claim 1 , wherein a molecular end of the aromatic polycarbonate resin is an alkyl group having 10 to 35 carbon atoms.  
   
   
       7 . The polycarbonate resin composition as claimed in  claim 1 , wherein the acrylonitrile-styrene base resin is an acrylonitrile-styrene copolymer.  
   
   
       8 . The polycarbonate resin composition as claimed in  claim 1 , wherein the impact resistance-improving agent is a core/shell type elastomer and/or a rubber component-containing styrene base resin.  
   
   
       9 . The polycarbonate resin composition as claimed in  claim 1 , wherein the organic alkali metal salt and/or the organic alkali earth metal salt are at least one selected from sulfonic acid alkali metal salts, sulfonic acid alkali earth metal salts, polystyrenesulfonic acid alkali metal salts and polystyrenesulfonic acid alkali earth metal salts.  
   
   
       10 . The polycarbonate resin composition as claimed in  claim 1 , wherein the functional group-containing silicone compound is organopolysiloxane having a fundamental structure presented represented by Formula (1):  
       R 1   a R 2   b SiO (4−a−b)/2    (1)  
     wherein R 1  represents a functional group; R 2  represents a hydrocarbon group having 1 to 12 carbon atoms; and a and b are numbers satisfying the relation of 0<a≦3, 0≦b<3 and 0<a+b≦3.  
   
   
       11 . The polycarbonate resin composition as claimed in  claim 10 , wherein R 1  is at least one selected from the group consisting of an alkoxy group, a hydrogen group, a hydroxyl group, an epoxy group and a vinyl group.  
   
   
       12 . The polycarbonate resin composition as claimed in  claim 1 , wherein the inorganic filler is selected from the group consisting of a tabular filler and a glass fiber.  
   
   
       13 . The polycarbonate resin composition as claimed in  claim 1 , blended with 1 to 20 mass parts of the tabular filler and 5 to 35 mass parts of the glass fiber as the inorganic filler.  
   
   
       14 . The polycarbonate resin composition as claimed in  claim 12 , wherein the tabular filler is at least one selected from the group consisting of talc, mica and wollastonite.  
   
   
       15 . The polycarbonate resin composition as claimed in  claim 1 , wherein the polyfluoroolefin resin is polytetrafluoroethylene.  
   
   
       16 . The polycarbonate resin composition as claimed in  claim 15 , wherein the polytetrafluoroethylene has a fibril-forming ability and has an average molecular weight of 500,000 to 10,000,000.  
   
   
       17 . A molded article comprising the polycarbonate resin composition as claimed in  claim 1.