Polycarbonate resin, and polycarbonate resin composition

Abstract

Provided is a polycarbonate resin, including, as a raw material, a bisphenol A having 100 ppm by mass or less of isopropenylphenol and 250 ppm by mass or less of 2-(2-hydroxyphenyl)-2-(4-hydroxyphenyl)propane, each detected after heating in air at 175° C. for 1 hour.

1 . A polycarbonate resin, comprising as a raw material, a bisphenol A having 100 ppm by mass or less of isopropenylphenol and 250 ppm by mass or less of 2-(2-hydroxyphenyl)-2-(4-hydroxyphenyl) propane, each detected after heating in air at 175° C. for 1 hour. 
     
     
         2 . The polycarbonate resin according to  claim 1 , wherein the bisphenol A serving as the raw material satisfies the following formula (i).
   (Concentration of isopropenylphenol detected after heating at 175° C. for 1 hour)−(concentration of isopropenylphenol before heating at 175° C. for 1 hour)≦50 ppm by mass   Formula (i)
   
     
     
         3 . The polycarbonate resin according to  claim 1 , wherein the polycarbonate resin has a viscosity-average molecular weight of from 9,000 to 17,500. 
     
     
         4 . A polycarbonate resin composition, comprising 100 parts by mass of (A) a polycarbonate resin containing 60 mass % or more of the polycarbonate resin of  claim 1 , and 100 ppm by mass to 1,500 ppm by mass of (B) a phosphorus-based antioxidant. 
     
     
         5 . The polycarbonate resin composition according to  claim 4 , wherein (B) the phosphorus-based antioxidant has a pentaerythritol structure. 
     
     
         6 . The polycarbonate resin composition according to  claim 4 , wherein (B) the phosphorus-based antioxidant comprises bis(2,6-di-tent-butyl-4-methylphenyl)pentaerythritol diphosphite and/or bis(2,4-dicumylphenyl)pentaerythritol diphosphite. 
     
     
         7 . The polycarbonate resin composition according to  claim 4 , further comprising, with respect to 100 parts by mass of (A) the polycarbonate resin, 200 ppm by mass to 1,500 ppm by mass of (C) a polyorganosiloxane having a functional group. 
     
     
         8 . The polycarbonate resin composition according to  claim 7 , wherein the functional group comprises at least one selected from the group consisting of an alkoxy group, an aryloxy group, a polyoxyalkylene group, a carboxyl group, a silanol group, an amino group, a mercapto group, an epoxy group, and a vinyl group. 
     
     
         9 . The polycarbonate resin composition according to  claim 7 , wherein a difference between a refractive index of (C) the polyorganosiloxane and a refractive index of (A) the polycarbonate resin is 0.13 or less. 
     
     
         10 . A molded body, which is obtained by molding the polycarbonate resin composition of  claim 4 . 
     
     
         11 . The molded body according to  claim 10 , wherein the molded body comprises a light-guiding plate. 
     
     
         12 . A bisphenol A, having 100 ppm by mass or less of isopropenylphenol and 250 ppm by mass or less of 2-(2-hydroxyphenyl)-2-(4-hydroxyphenyl)propane, each detected after heating in air at 175° C. for 1 hour. 
     
     
         13 . A method of producing a polycarbonate resin, comprising using as a raw material, a bisphenol A having 100 ppm by mass or less of isopropenylphenol and 250 ppm by mass or less of 2-(2-hydroxyphenyl)-2-(4-hydroxyphenyl)propane, each detected after heating in air at 175° C. for 1 hour.