Abstract: A kind of acrylate polymer emulsion being provided with water and oil repellent properties was synthesized by emulsion polymerization, in which the fluorinated acrylate together with glycidyl methacrylat, N,N-dimethyl formamide, butyl acrylate and dipropylene glycol was selected as monomers, and NP-10, NP-8 and octadecyl trimethyl ammonium chloride were employed as emulsifying agent, and 2,2’-azoisobutyramidinedihydrochloride was taken as the initiator in this article. The effects of pre-emulsifying technology on the emulsion particle size and application were discussed, and the structure was featured by IR. The results demonstrated that the emulsion particle size distributed in 50~57nm and the emulsion particle was positive electricity after being pre-emulsificated twice under the pressure of 15000psi by micro-jet dispersion method. And the performance was stable. Therefore, the water and oil repellent properties of the cotton fabrics treated with the emulsion was excellent, and the contact angle to water and oil were over 140o and 145o respectively.

Key words: micro-jet method, pre-emulsifying, emulsion polymerization, contact angle, fabric