Polycarbonate resin composition and molded article produced therefrom
The polycarbonate resin composition includes: a polycarbonate component, which includes an aromatic polycarbonate resin and a copolymerized polycarbonate resin including a repeat unit represented by Formula 1 and a repeat unit represented by Formula 2; and a flame retardant, and has a scratch width of about 310 μm or less as measured by Ball-type Scratch Profile (BSP) test; a pencil hardness rating of F or higher; a flame retardancy level of V-0 or higher as measured on a 2.0 mm thick specimen according to UL94; and a transmittance of about 80% or more as measured in accordance with ASTM D1003. The polycarbonate resin composition can exhibit excellent properties in terms of scratch resistance, flame retardancy and transparency. wherein R 1 and R 2 are the same or different and are each independently substituted or unsubstituted C 1 to C 6 alkyl, and a and b are the same or different and are each independently an integer from 1 to 4.
1. A polycarbonate resin composition comprising:
a polycarbonate component, which comprises an aromatic polycarbonate resin and a copolymerized polycarbonate resin comprising a repeat unit represented by Formula 1 and a repeat unit represented by Formula 2; and
a flame retardant,
wherein the polycarbonate component comprises the aromatic polycarbonate resin in an amount of about 30 wt % to about 70 wt % and the copolymerized polycarbonate resin in an amount of about 30 wt % to about 70 wt %,
wherein, in the copolymerized polycarbonate resin, the repeat unit represented by Formula 1 is present in an amount of about 5 mol % to about 70 mol % and the repeat unit represented by Formula 2 is present in an amount of about 30 mol % to about 95 mol %, and
the polycarbonate resin composition having: a scratch width of 290 μm or less as measured by Ball Scratch Profile (BSP) test; a pencil hardness rating of F or higher; a flame retardancy level of V-0 or higher as measured on a 2.0 mm thick specimen according to UL94; a Vicat softening temperature (VST) of 102.5° C. or more, as measured in accordance with ASTM D1525; and a transmittance of about 85% or more as measured in accordance with ASTM D1003,
wherein R 1 and R 2 are the same or different and each independently substituted or unsubstituted C 1 to C 6 alkyl, and a and b are the same or different and each independently an integer from 1 to 4.
2. The polycarbonate resin composition according to claim 1 , wherein the repeat unit represented by Formula 2 is a repeat unit represented by Formula 2a:
3. The polycarbonate resin composition according to claim 1 , comprising the flame retardant in an amount of about 5 parts by weight to about 40 parts by weight based on about 100 parts by weight of the polycarbonate component.
4. The polycarbonate resin composition according to claim 1 , wherein the copolymerized polycarbonate resin further comprises a repeat unit represented by Formula 3:
wherein R 3 and R 4 are the same or different and are each independently substituted or unsubstituted C 1 to C 6 alkyl, and m and n are the same or different and are each independently an integer from 0 to 4.
5. The polycarbonate resin composition according to claim 4 , wherein the repeat unit represented by Formula 3 is present in an amount of about 1 part by mole to about 30 parts by mole based on about 100 parts by mole of the repeat units represented by Formulae 1 and 2.
6. A molded article produced from the polycarbonate resin composition according to claim 1 .
7. The polycarbonate resin composition according to claim 1 , wherein the polycarbonate resin composition has a Vicat softening temperature (VST) of about 102.5° C. to about 130° C. as measured in accordance with ASTM D1525.
8. The polycarbonate resin composition according to claim 7 , wherein the polycarbonate resin composition has a transmittance of about 85% to about 95% as measured in accordance with ASTM D1003.
9. The polycarbonate resin composition according to claim 1 , wherein the aromatic polycarbonate is prepared by condensation or transesterification of a dihydric phenol compound and a carbonate precursor, wherein the dihydric phenol compound is selected from the group consisting of 2,2-bis(4-hydroxyphenyl)propane, hydroquinone, 4,4′-dihydroxydiphenyl, bis(4-hydroxyphenyl)methane, 2,2-bis(3,5-dimethyl-4-hydroxyphenyl)propane, bis(4-hydroxyphenyl)sulfide, bis(4-hydroxyphenyl)sulfone, bis(4-hydroxyphenyl)sulfoxide, bis(4-hydroxyphenyl)ketone, bis(4-hydroxyphenyl)ether, 2,2-bis(3,5-dibromo-4-hydroxyphenyl)propane, and combinations thereof.
10. The polycarbonate resin composition according to claim 1 , wherein, in the copolymerized polycarbonate resin, the repeat unit represented by Formula 1 is present in an amount of about 5 mol % to about 45 mol %, and wherein the polycarbonate resin composition has a scratch width of 270 μm or less as measured by Ball Scratch Profile (BSP) test.
11. The polycarbonate resin composition according to claim 10 , wherein the polycarbonate resin composition has a pencil hardness rating from H to 3H.
12. The polycarbonate resin composition according to claim 10 , wherein, in the copolymerized polycarbonate resin, the repeat unit represented by Formula 2 is present in an amount of about 50 mol % to about 95 mol %, and wherein the copolymerized polycarbonate resin further optionally comprises a repeat unit represented by Formula 3:
wherein R 3 and R 4 are the same or different and are each independently substituted or unsubstituted C 1 to C 6 alkyl, and m and n are the same or different and are each independently an integer from 0 to 4, in an amount of 0 to about 30 parts by mole based on about 100 parts by mole of the repeat units represented by Formulae 1 and 2.