Polycarbonate resin composition and molded product formed from same
The polycarbonate resin composition of the present invention comprises: a polycarbonate ingredient including a copolymerized polycarbonate resin and an aromatic polycarbonate resin, the copolymerized polycarbonate resin having a repeating unit represented by chemical formula 1 of claim 1 , a repeating unit represented by chemical formula 2 of claim 1 , and a repeating unit represented by chemical formula 3 of claim 1 ; and an acrylic-based impact reinforcing agent. The polycarbonate resin composition has excellent scratch resistance, impact resistance, and heat resistance.
1. A polycarbonate resin composition comprising:
a polycarbonate component comprising about 1 wt % to about 90 wt % of a copolymerized polycarbonate resin containing a repeat unit represented by Formula 1, a repeat unit represented by Formula 2, and a repeat unit represented by Formula 3, and about 1 wt % to about 90 wt % of an aromatic polycarbonate resin consisting of units derived from the condensation or transesterification of a carbonate precursor with a dihydric phenol compound; and
an acrylic impact modifier, wherein the acrylic impact modifier is a graft copolymer in which methyl methacrylate is grafted to a rubbery polymer including at least one of a C 4 to C 6 diene rubber and an acrylate rubber obtained by polymerizing at least one C 4 to C 20 alkyl (meth)acrylate:
where R 1 and R 2 are each independently a substituted or unsubstituted C 1 to C 6 alkyl group, and m and n are each independently an integer from 0 to 4.
2. 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 1 mol % to about 69 mol %, the repeat unit represented by Formula 2 is present in an amount of about 30 mol % to about 98 mol %, and the repeat unit represented by Formula 3 is present in an amount of about 1 mol % to about 50 mol %.
3. The polycarbonate resin composition according to claim 1 , comprising the acrylic impact modifier in an amount of about 1 part by weight to about 30 parts by weight based on 100 parts by weight of the polycarbonate component.
4. The polycarbonate resin composition according to claim 1 , wherein the polycarbonate resin composition has a scratch width of 312 μm or less, as measured by a ball-type scratch profile (BSP) test, and has a pencil hardness of HB or higher.
5. The polycarbonate resin composition according to claim 1 , wherein the polycarbonate resin composition has an Izod impact strength of about 12 kgf·cm/cm to about 90 kgf·cm/cm measured on a 1/8″ thick notched Izod specimen in accordance with ASTM D256.
6. The polycarbonate resin composition according to claim 1 , wherein the polycarbonate resin composition has a Vicat softening temperature (VST) of about 110° C. to about 150° C.
7. A molded article formed from the polycarbonate resin composition according to claim 1 .
8. The polycarbonate resin composition according to claim 1 , wherein the polycarbonate resin composition has a scratch width of 200 μm to 306 μm, as measured by a ball-type scratch profile (BSP) test.
9. The polycarbonate resin composition according to claim 1 , wherein the acrylic impact modifier is a methyl methacrylate-butadiene-ethyl acrylate graft copolymer.
10. The polycarbonate resin composition according to claim 1 , wherein the acrylic impact modifier is a graft copolymer in which methyl methacrylate is grafted to a rubbery polymer including an acrylate rubber.
11. The polycarbonate resin composition according to claim 1 , comprising 10 wt % to 80 wt % of the copolymerized polycarbonate resin and 10 wt % to 85 wt % of the aromatic polycarbonate resin.
12. The polycarbonate resin composition according to claim 11 , wherein the polycarbonate resin composition has an Izod impact strength of about 12 kgf·cm/cm to about 60 kgf·cm/cm measured on a 1/8″ thick notched Izod specimen in accordance with ASTM D25610 and a scratch width of about 200 μm to 306 μm, as measured by a ball-type scratch profile (BSP) test.