Thermoplastic resin composition and exterior material including the same

A thermoplastic resin composition, comprising, based on a total weight of the thermoplastic resin composition:

• 10 to 50% by weight in total of:
• the alkyl acrylate-aromatic vinyl compound-vinyl cyanide compound graft copolymer (A-1) containing a first alkyl acrylate rubber having an average particle diameter of 0.33 to 0.5 μm and
• the alkyl acrylate-aromatic vinyl compound-vinyl cyanide compound graft copolymer (A-2) containing a second alkyl acrylate rubber having an average particle diameter of 0.05 to 0.2 μm;
• 0 to 30% by weight of the aromatic vinyl compound-vinyl cyanide compound copolymer (B-1), the copolymer (B-1) comprising, based on 100 wt % of a sum of a first aromatic vinyl compound and a first vinyl cyanide compound:
• 67 to 75% by weight of the first aromatic vinyl compound and
• 25 to 33% by weight of the first vinyl cyanide compound;
• 20 to 70% by weight of the aromatic vinyl compound-vinyl cyanide compound copolymer (B-2), the copolymer (B-2) comprising, based on 100 wt % of a sum of a second aromatic vinyl compound and a second vinyl cyanide compound:
• 70 to 75% by weight of the second aromatic vinyl compound and
• 25 to 30% by weight of the second vinyl cyanide compound;
• and
• 0.5 to 10% by weight of the polyamide resin (C), the resin (C) having a melting temperature (Tm) of 250° C. or higher,
• wherein the graft copolymer (A-1) is an emulsion graft copolymer that comprises, based on 100 wt % of a sum of the first acrylate rubber, a third aromatic vinyl compound, and a third vinyl cyanide;
• 30 to 60% by weight of the first alkyl acrylate rubber that has the average particle diameter of 0.33 to 0.5 μm,
• 20 to 50% by weight of the third aromatic vinyl compound, and
• 10 to 30% by weight of the third vinyl cyanide compound, where the third aromatic vinyl compound and the third vinyl cyan compound are graft-bonded to the first acrylate rubber,
• wherein the graft copolymer (A-2) is an emulsion graft copolymer that comprises, based on 100 wt % of a sum of the second acrylate rubber, a fourth aromatic vinyl compound, and a fourth vinyl cyanide:
• 30 to 60% by weight of the second alkyl acrylate rubber that has the average particle diameter of 0.05 to 0.2 μm,
• 20 to 50% by weight of the fourth aromatic vinyl compound, and
• 10 to 30% by weight of the fourth vinyl cyanide compound, where the fourth aromatic vinyl compound and the fourth vinyl cyan compound are graft-bonded to the second acrylate rubber,
• wherein the copolymer (B-1) has a weight average molecular weight of 100,000 to 150,000 g/mol,
• wherein the copolymer (B-2) has a weight average molecular weight of greater than 150,000 g/mol and less than or equal to 200,000 g/mol,
• wherein each of the first aromatic vinyl compound, the second aromatic vinyl compound, the third aromatic vinyl compound, and the fourth aromatic vinyl compound includes styrene,
• wherein each of the first vinyl cyanide compound, the second vinyl cyanide compound, the third vinyl cyanide compound, and the fourth vinyl cyanide compound includes acrylonitrile, and
• wherein the graft copolymer (A-1) and the graft copolymer (A-2) each has a coloring power coverage value (X) of 20% or more as calculated by Equation 1 below:
• X={A/S}×100, [Equation 1]
• wherein S represents a content (wt %) of a soluble material after dissolving the graft copolymer in acetone and performing centrifugation, and A represents a content (wt %) of the vinyl cyanide compound in the soluble material after the dissolving of the graft copolymer in acetone and performing the centrifugation.