Low-smoke high-fire retardation powder styrene butadiene rubber preparation method

A purpose of the present invention is to provide a preparation method of a low-smoke high-fire retardation type powder styrene butadiene rubber with the maximum smoke density of less than 130 and the oxygen index of more than 40%. According to the present invention, a butadiene-styrene latex is respectively subjected to graft polymerization modification with trihalo phenyl allyl carbonate and a polar monomer, water-soluble macromolecules are adopted to carry out coating modification on an inorganic smoke inhibitor, and the functionalized smoke inhibitor and the graft-modified butadiene-styrene latex are mixed and then directly aggregate into the powder. With the method, the problems of poor dispersity, easy agglomeration, easy migration, easy precipitation, and the like of the inorganic smoke inhibitor in the butadiene-styrene latex matrix are solved, and the smoke inhibition effect of the inorganic smoke inhibitor is significantly improved.