Polylactic acid/polycarbonate resin composition and molded product made using the same

1. A polylactic acid/polycarbonate resin composition comprising

(A) a mixed resin including (a1) about 10 to about 90 wt % of a polycarbonate resin and (a2) about 10 to about 90 wt % of a polylactic acid resin; and

(B) about 1 to about 20 parts by weight of a modified acrylic-based resin based on about 100 parts by weight of the mixed resin,

wherein the modified acrylic-based resin (B) comprises a copolymer of an alkyl(meth)acrylate monomer; an aromatic acrylic-based monomer; and optionally a cyclic ester acrylic-based monomer, a monofunctional unsaturated monomer polymerizable with the alkyl(meth)acrylate monomer, or a combination thereof, and

wherein the modified acrylic-based resin (B) includes the alkyl(meth)acrylate monomer in an amount of about 30 to about 50 wt % based on the total weight of the modified acrylic-based resin (B).

2. The polylactic acid/polycarbonate resin composition of claim 1 , wherein the polycarbonate resin is prepared by reacting one or more diphenols with a compound of phosgene, halogen formate, carbonate ester, or a combination thereof.

3. The polylactic acid/polycarbonate resin composition of claim 1 , wherein the polylactic acid resin comprises a repeating unit derived from L-lactic acid, D-lactic acid, L,D-lactic acid, or a combination thereof.

4. The polylactic acid/polycarbonate resin composition of claim 1 , wherein the aromatic ester acrylic-based monomer comprises 2-ethylphenoxy(meth)acrylate, 2-ethylthiophenyl(meth)acrylate, 2-ethylaminophenyl(meth)acrylate, phenyl(meth)acrylate, benzyl(meth)acrylate, 2-phenylethyl(meth)acrylate, 3-phenylpropyl(meth)acrylate, 4-phenylbutyl(meth)acrylate, 2-(2-methylphenyl)ethyl(meth)acrylate, 2-(3-methylphenyl)ethyl(meth)acrylate, 2-(4-methylphenyl)ethyl(meth)acrylate, 2-(4-propylphenyl)ethyl(meth)acrylate, 2-(4-(1-methylethyl)phenyl)ethyl(meth)acrylate, 2-(4-methoxyphenyl)ethyl(meth)acrylate, 2-(4-cyclohexylphenyl)ethyl(meth)acrylate, 2-(2-chlorophenyl)ethyl(meth)acrylate, 2-(3-chlorophenyl)ethyl(meth)acrylate, 2-(4-chlorophenyl)ethyl(meth)acrylate, 2-(4-bromophenyl)ethyl(meth)acrylate, 2-(3-phenylphenyl)ethyl(meth)acrylate, 2-(4-benzylphenyl)ethyl(meth)acrylate, or a combination thereof.

5. The polylactic acid/polycarbonate resin composition of claim 1 , wherein the monofunctional unsaturated monomer polymerizable with the alkyl(meth)acrylate monomer comprises styrene, nitrile, unsaturated carboxylic acid, acid anhydride, hydroxyl-containing acrylate, amide, allylglycidylether, glycidylmethacrylate, or a combination thereof.

6. The polylactic acid/polycarbonate resin composition of claim 1 , wherein the polylactic acid/polycarbonate resin composition further comprises about 1 to about 20 parts by weight of (C) an impact-reinforcing agent based on about 100 parts by weight of the mixed resin.

7. The polylactic acid/polycarbonate resin composition of claim 6 , wherein the impact-reinforcing agent comprises a core-shell copolymer obtained by grafting a unsaturated compound comprising an acrylic-based monomer, a hetero cyclic monomer, an aromatic vinyl monomer, an unsaturated nitrile monomer, or a combination thereof, onto a rubber polymer obtaining by polymerization of a diene-based monomer, an acrylic-based monomer, a silicon-based monomer, or a combination thereof.

8. A molded product made using the polylactic acid/polycarbonate resin composition according to claim 1 .