Reducing agent monomer for preparing styrene-acrylic emulsion by oxidation-reduction reaction at room temperature, and synthesis method thereof

A method for preparing a styrene-acrylic emulsion by an oxidation-reduction reaction at room temperature using an oxidation-reduction initiation system, wherein

• the oxidation-reduction initiation system is formed from a reducing agent monomer and a persulfate, and the reducing agent monomer is 4-(2-(dimethylamino)ethoxy)-4-oxobut-2-enoic acid synthesized using maleic anhydride (MAH) and dimethylethanolamine (DMEA) as raw materials;
• the method comprises:
• adding a pH regulator, an emulsifier, the reducing agent monomer, and a dispersion medium into a reaction flask to obtain a mixture, and stirring said mixture for 3 min to 4 min to allow a thorough dissolution to obtain a mixed solution, wherein the dispersion medium is water (H2O);
• adding monomers into the mixed solution for pre-emulsification under stirring for 30 min to obtain a pre-emulsified product, wherein the monomers comprise styrene, butyl acrylate (BA), and methyl methacrylate (MMA);
• vacuum-pumping, and adding the persulfate to the pre-emulsified product in an argon atmosphere to obtain a resulting system;
• and
• subjecting the resulting system to a free-radical microemulsion polymerization in a thermostat water bath to obtain the styrene-acrylic emulsion.