Method for synthesizing latex of heatresistant resin in maleimide class

This invention discloses a method for synthesizing heat-resistant maleimide resin emulsion. The method comprises: (1) adding the emulsifier, part of arylethylene monomer, part of nitrilethylene monomer and the initiator into a reactor equipped with a stirrer, and emulsifying to obtain a primary emulsion; (2) adding maleimide monomer, the rest nitrilethylene monomer and the rest arylethylene monomer into a mixing tank to form a homogeneous mixed solution of the monomers; (3) adding desalted water, the initiator, the emulsifier and the mixed solution into an emulsator, and emulsifying to obtain a monomer emulsion; (4) adding the emulsion to the reactor, and polymerizing with the primary emulsion to obtain the heat-resistant resin emulsion. The heat-resistant resin emulsion has such advantages as good appearance, uniform composition and structure, good heat resistance and high yield. The heat-resistant resin emulsion can be used for heat-resistant modification of ABS, PC and PBT, and for manufacturing high heat-resistant elements of vehicles and electric appliances.