| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a polycarbonate resin composition having both a high surface hardness and a high impact resistance, and excellent in flame retardancy and transparency. <P>SOLUTION: A polycarbonate resin contains a polycarbonate resin (A) having a specific structural unit and a viscosity-average molecular weight (Mv) of 20,000 to 35,000 and a polycarbonate resin (B) having a specific structural unit and a viscosity-average molecular weight (Mv) of 16,000 to 28,000 in a proportion of (A)/(B) of 80/20 to 20/80 in mass ratio. The polycarbonate resin composition contains 100 pts.mass of the polycarbonate resin and 0.01 to 1 pt.mass of a flame retardant, and has a Dupont impact strength at 25°C of ≥10 J as measured according to ASTM D2794, and a ratio (η<SB POS="POST">10</SB>/η<SB POS="POST">1,000</SB>) of melt viscosities of 3 to 8, the melt viscosity η<SB POS="POST">10</SB>being measured at 300°C and at a shear rate of 10 sec<SP POS="POST">-1</SP>and the melt viscosity η<SB POS="POST">1,000</SB>being measured at 300°C and at a shear rate of 1,000 sec<SP POS="POST">-1</SP>. <P>COPYRIGHT: (C)2013,JPO&INPIT |
