| 摘要 |
PURPOSE: Provided is a thermoplastic resin composition having improved weather-resistance, impact-resistance, and gloss property, which is produced by using butadiene-acryl-based rubber polymers having different average particle sizes and properties. CONSTITUTION: The thermoplastic resin composition is produced by a process comprising the steps of: graft-copolymerizing a rubber polymer latex having the gel content of 60-80wt% and an average particle size of 0.10-0.15 micrometer and a graft monomer; graft-copolymerizing the first graft copolymer, a rubber polymer latex having the gel content of 50-70wt% and an average particle size of 0.25-0.30 micrometer and a graft monomer; graft-copolymerizing the second graft copolymer, a rubber polymer latex having the gel content of 40-50wt% and an average particle size of 0.50-0.65 micrometer and a graft monomer. The rubber polymer latex is a butadiene-acrylate copolymer, a butadiene-acrylate-styrene copolymer, or a butadiene-acrylate-acrylonitrile copolymer and the graft monomer is an aromatic vinyl monomer, an unsaturated nitrile monomer, or a mixture thereof.
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