| Microemulsion has a lot of excellent performances such as small and narrow particle size(10～100nm), the thermodynamic stability and high-lucency ect. However, the microemulsion was limited in industrial development due to the high emulsifier content, low concentration, and poor water resistance of the most of microemulsion. It is necessary to synthesis Styrene-Acrylic latex with ultra fine particle size for the film with high-tightness and high-luster. In this paper, the idea of designing particle structure was introduced, and the Styrene-Acrylic microlatex with core-shell structure were successfully synthesized by the microemulsion polymerization of"the Winsor I-like".①Fistly, the polyacrylate microlatex was successfully synthesized by micro- emulsion polymerization of"the WinsorI-like", with emulsifiers content 2.0%, concentration 38.5%, particle size 35.7nm, polydispersity of particle size 0.196. The influences of polymerization technical conditions including emulsifier level, polymerization temperature and agitation intensity on particle size and performances of latex were studied, and the polymerization mechanism was also discussed by DLS(Dynamic Light Scattering)method. The result shows the most possible nucleation locations of the polyacrylate latex particles are solulization micelles and monomer microdrops.②The Styrene-Acrylic microlatex with core-shell was successfully synthesized secondly by microemulsion polymerization of"the Winsor I-like", with emulsifiers content 2.5%, concentration 45.6%, particle size 46.2nm, and polydispersity of particle size 0.175. Influences of microlatex particle and performances of Styrene-Acrylic microlatex including that the proportion of the soft and hard monomer, the amount of Core-shell monomer, the amount of Styrene were studied. The crossing agent DVB and NMA were introduced into the system, and experimental results show that, the water resistance of Styrene-Acrylic microemulsion film was improved, and the ratio of absorbing water downwards from 10.67% to 4.32%, due to the NMA and DVB.Compared with the polyacrylate microlatex, the Styrene-Acrylic microlatex has higher concentration, and its film are excellent in adhesive, water-resistance and hardness due to the core-shell technology. |
