Method of Preparing Low-costed AS Resin with Good Heat Resistance

摘要

The method for producing a superior heat resistance with low cost AS resin according to the present invention is deionized water, primary dispersant and a secondary dispersant comprising: a first step of mixing were charged into a reactor, 60 to 80 parts by weight of alpha-methyl styrene monomer, acrylonitrile monomer, and 20 to 40 parts by weight of the two types of peroxide-based polymerization initiator continuously to the reactor 0.1 to 1 parts by weight after the second step of a batch input, and the degree of polymerization while maintaining the temperature of the reactor to 60~90 be suspended until the polymerization reaction reached 70-85%, while raising the temperature of the reactor to 100~125 characterized in that it comprises a third step of the suspension polymerization reaction. At this time, the two kinds of the peroxide-based polymerization initiator is preferably a functional group having the 10-hour half-life temperatures are different from each other, the two kinds of the peroxide-based polymerization initiator are each half-life temperature of the initiator and the half-life temperature of 60~80 The 80~120 and the initiator, it is more preferable that each dose is 0.2 to 0.6 parts by weight of 0.05 to 0.3 parts by weight.