| 摘要 |
PURPOSE: A thermoplastic transparent resin composition and its preparation method are provided, to improve the transparency, the impact resistance, the chemical resistance and the processability by optimizing the refractive index of a monomer mixture. CONSTITUTION: The thermoplastic resin composition comprises 3-15 parts by weight of a small-sized polybutadiene rubber latex; 5-25 parts by weight of a large-sized polybutadiene rubber latex; 40-70 parts by weight of a methacrylic acid alkyl ester compound or an acrylic acid alkyl ester compound; 15-30 parts by weight of an aromatic vinyl compound; 1-20 parts by weight of a vinyl cyano compound; and optionally 0.2-0.6 parts by weight of an emulsifier, 0.2-0.6 parts by weight of a molecular weight controlling agent and 0.05-0.3 parts by weight of a polymerization initiator. Preferably the small-sized polybutadiene rubber latex has an average particle size of 600-1,500 Angstrom, a gel content of 70-95% and a swelling index of 12-30; and the large-sized polybutadiene rubber latex has an average particle size of 2,600-5,000 Angstrom, a gel content of 70-95% and a swelling index of 12-30.
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