Preparation method of styrene-butadiene latex with large particle size and high solid content

The invention relates to the technical field of styrene-butadiene latex, and discloses a preparation method of styrene-butadiene latex with large particle size and high solid content, which is characterized in that N-(4-bromophenyl) maleimide and di (p-aminophenoxy) dimethylsilane are subjected to substitution reaction to obtain bis-phenyl maleimide siloxane. And carrying out initiation copolymerization on the polybisphenylmaleimide siloxane grafted montmorillonite and montmorillonite under the action of dibenzoyl peroxide, so as to obtain the polybisphenylmaleimide siloxane grafted montmorillonite. Styrene, divinyl benzene and butadiene are subjected to a polymerization reaction under initiation of potassium persulfate to obtain large-particle-size styrene-butadiene latex, and sodium oleate is added into the large-particle-size styrene-butadiene latex to obtain the large-particle-size high-solid-content styrene-butadiene latex. Finally, uniformly stirring the poly (biphenylmaleimide) siloxane grafted montmor