| 摘要 |
In a process for preparing a styrenic resin, a rubber graft copolymer (A) having a weight average particle size of 0.05-0.8 mu m by coagulation and drying of a rubber graft copolymer latex (a). The rubber graft copolymer latex (a) is made from graft polymerization of a vinyl aromatic monomer and a vinyl cyanide monomer in the presence of a butadienic rubber latex. The styrenic resin is then prepared by a continuous bulk or solution polymerization method. The method comprises continuously charging 80 to 45 parts by weight of a vinyl aromatic monomer, 15 to 50 parts by weight of a vinyl cyanide monomer, 0 to 40 parts by weight of a copolymerizable monomer (totally 100 parts by weight of monomers), 0.1 to 6 parts by weight of the rubber graft copolymer based on 100 parts by weight of monomers and 0.1 to 10 parts by weight of an acrylic-based copolymer (B) based on 100 parts by weight of monomers into a reactor; polymerizing them to a conversion of 40 to 90 wt %; and removing the unreacted monomers and volatile components from the polymerized mixture. The styrenic resin produced by the above process has suitable impact strength, good rigidity and hardness, and excellent appearance and semi-transparency.
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