METHOD OF PREPARING LOW-COSTED AS RESIN WITH GOOD HEAT RESISTANCE

摘要

A first stage process for producing an AS resin having excellent heat resistance according to the present invention at a low cost are mixed by introducing the deionized water, primary dispersant and secondary dispersant in the reactor, 60 to 80 parts by weight of alpha-methyl styrene monomer, acrylonitrile monomer on 20 to 40 parts by weight of the two types of the peroxide-based polymerization initiator is 0.1 to 1 part by weight of the second step is continuously introduced into the batch in the reactor, and a degree of polymerization of 70-85% with a 60~90 ℃ maintain the temperature of the reactor after the suspension polymerization reaction to reach, as 100~125 ℃ characterized in that it comprises a third step of the suspension polymerization reaction while raising the temperature of the reactor. At this time, the two kinds of the peroxide-based polymerization initiator 10-hour half-life temperatures are different from each other is desirable, and the two kinds of the peroxide-based polymerization initiator and each of the half-life temperature of the initiator and the half-life temperature of 60~80 ℃ having a functional group and the initiator is 80~120 ℃, it is more preferable that the amount is 0.2 to 0.6 parts by weight and 0.05 to 0.3 parts by weight, respectively.