Patent ID: 7019049

Claim:
A process for preparing thermoplastic transparent resin comprising the steps of: (i) preparing a transparent graft resin by grafting a monomer mixture comprising 20 to 50 parts by weight of conjugated diene rubber latex, 10 to 50 parts by weight of methacrylic acid alkylester compound or acrylic acid alkylester compound, 5 to 25 parts by weight of aromatic vinyl compound, and 1 to 10 parts by weight of vinyl cyanide compound through an emulsion polymerization using between 0.2 and 0.3 parts by weight of alkylaryl sulfonate salts as emulsifier; (ii) preparing methylmethacrylate-styrene-acrylonitrile (MSAN) copolymer by copolymerizing 50 to 75 parts by weight of methacrylic acid alkylester compound or alkylester compound, 20 to 45 parts by weight of aromatic vinyl compound, and 1 to 10 parts by weight of vinyl cyanide compound during bulk polymerization; and (iii) blending the transparent graft resin of step (i) with the MSAN copolymer of step (ii).