| 主权项 |
1. A thermal stabilizer-free thermoplastic resin composition comprising:
a rubber-reinforced resin a); and a matrix resin b), wherein the rubber-reinforced resin a) comprises a rubber polymer latex, an aromatic vinyl compound, a vinyl cyanide compound and an emulsifier and is obtained by graft copolymerization, and wherein the emulsifier comprises at least one emulsifier selected from the group consisting of sulfoethyl methacrylate, 2-acrylamido-2-methylpropane sulfonic acid, sodium styrene sulfonate, sodium dodecyl allyl sulfosuccinate, a copolymer of styrene and sodium dodecyl allyl sulfosuccinate, polyoxyethylene alkylphenyl ether ammonium sulfate, alkenyl C16-18 succinic acid di-potassium salt, and sodium methallyl sulfonate, wherein the rubber polymer latex has a particle diameter of between 2,500 and 5,000 Å and a gel content of 85 to 99% by weight, and wherein the rubber polymer latex is obtained aggregating a rubber polymer latex having a particle diameter between 600 and 1,500 Å and a gel content of 85 to 99% using an acid or a polymer aggregation agent, and wherein a moisture content of the rubber-reinforced resin is between 2 and 20%, wherein the emulsifier is included in an amount of 0.001 to 0.3 parts by weight based on 100 parts by weight in total of the rubber polymer latex, the aromatic vinyl compound and the vinyl cyanide compound contained in the rubber-reinforced resin, and wherein the residual emulsifier content in a rubber-reinforced resin a) is 19,000 ppm or less. |
