A MANUFACTURING METHOD FOR SAN RESIN WITH IMPROVED YIELD AND PRODUCTIVITY

摘要

In an embodiment of the present invention, (a) polymerization at 60 to 90° C. by adding a suspension containing an aromatic vinyl monomer, an unsaturated nitrile monomer, a molecular weight modifier, a dispersant, and water in the presence of a radical initiator; (b) adding water to perform polymerization when the polymerization conversion rate reaches 10 to 70% in step (a); And (c) heat-treating the product of step (b) at 70 to 130° C., wherein the weight ratio of the aromatic vinyl monomer and the unsaturated nitrile-based monomer to the water in step (a) is 1: It provides a method of manufacturing a SAN resin, which is 0.3~2.0.