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Cationic polymeric emulsifier its amphiphile anchoring on the colloidal particles, so to be able to overcome the easy migration of small molecule emulsifiers affect film performance, pollute the environment and many other shortcomings, has good prospects for development in the emulsion polymerization . In this paper, the process of preparation of cationic polymeric emulsifier for emulsion synthesis, system stability phenylpropionate, pure acrylic and elastic latex. Firstly, the synthesis of the cationic polymeric emulsifier, experimental main monomer styrene (St), butyl acrylate (BA), methyl acrylate, dimethylaminoethyl methacrylate (DM) for the functional monomer copolymerization, then epichlorohydrin (ECH), the quaternizing agent prepared cationic polymeric emulsifier. The impact on the synthesis reaction of the polymerization temperature and time during the synthesis the quaternization reaction temperature, time, ECH and DM molar ratio and other factors, determine the optimum conditions Synthesis of 15,989 molecular weight of the cationic polymeric emulsifier: azobisisobutyronitrile (AIBN) as initiator, polymerization temperature of 75 ° C, polymerization time 4h, the quaternization reaction temperature 55 ° C, the reaction time 1h, ECH and DM molar ratio of 1.5:1. The thus obtained random cationic polymeric emulsifier able to significantly reduce the surface tension of the solution. Papers will be obtained cationic high-molecular emulsifier for emulsion polymerization, of the polymerization process, the polymer emulsifier system the amount of (DM, a polymer amount of emulsifier, the polymeric emulsifier St / BA mass ratio, AIBN dosage) The pre-emulsified monomer is added dropwise in time, the initiator type and amount, the reaction temperature, holding time, and post-treatment agent (t-butyl hydrogen peroxide (TBHP) and sodium formaldehyde sulfoxylate (SFS) dosage) the impact of the emulsion synthesis, research showed that the pre-emulsified monomer dropwise addition, seed emulsion polymerization process, 4.5% of the emulsifier DM dosage main monomer St / BA mass ratio of 6/4, the initiator agent AIBN dosage 1.3%, the pre-emulsified liquid was added 45min, AIBA is an emulsion the polymerization initiator, the amount of 0.05%, the reaction temperature is 75 ° C, incubated for 2h, the reaction final with 0.02% of the post-treatment agent to remove residual monomers, synthetic latex, pan-blue light, good stability, high monomer conversion, no pungent odor, can be used directly. Papers will be obtained cationic high-molecular emulsifier for benzenepropanoic found that different types of synthesis of stable random synthesis of pure acrylic and elastomeric emulsions, the different Tg emulsion required amount of emulsifier is also different. Synthesis of styrene-acrylic emulsion: Tg = 15 ℃, the optimum amount of emulsifier 19%, Tg = 20 ° C, 25 ° C, 30 ° C, 35 ° C, the optimum amount of 18% emulsifier; the synthetic acrylic emulsion: Tg = 15 ° C, 20 ° C, 25 ° C, 30 ° C, 35 ° C, the emulsifier optimum amount of respectively 17%, 16%, 15%, 18%, 19%. Synthetic elastomer emulsion: Tg = -30 ℃, the optimum amount of emulsifier 18%, Tg = -25 ° C, -20 ° C, -15 ° C, -10 ° C, the optimum amount of 17% emulsifier. Delicate synthetic latex, uniform, moderate viscosity and high stability.
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