以苯乙烯(St)、丙烯酸(AA)、甲基丙烯酸甲酯(MMA)和丙烯酸丁酯(BA)为共聚单体,制备了无皂苯丙乳液;然后以AA含量、中和度、引发剂含量和软/硬单体配比等为试验因素,以乳液稳定性和粒径为考核指标,采用单因素试验法优选出制备无皂苯丙乳液的最佳工艺条件。结果表明:当w(引发剂)=1.2%和w(AA)=4.5%(均相对于单体总质量而言)、中和度为0.8、m(BA)∶m(St+MMA)=4∶6和反应温度为78℃时,可制得粒径为纳米级的高固含量稳定乳液。 Soap-free styrene-acrylic emulsion was prepared by copolymerization of styrene (St), acrylic acid (AA), methyl methacrylate (MMA) and butyl acrylate (BA) Agent content and the ratio of soft / hard monomer as the experimental factors, the emulsion stability and particle size as an assessment index, the best process conditions for the preparation of soap-free styrene-acrylic emulsion by single factor test method. The results show that the degree of neutralization is 0.8 when w (initiator) = 1.2% and w (AA) = 4.5% (both relative to the total monomer mass) 4: 6 and the reaction temperature is 78 ℃, we can get the particle size of nano-level high solid content stable emulsion.