Styrene-butadiene latex for powdered rubber and production method of styrene-butadiene latex

The invention discloses styrene-butadiene latex for powdered rubber and a production method of the styrene-butadiene latex. The production method adopts a high-temperature premixing and continuous feeding polymerization process. The mass ratio of raw materials including styrene and butadiene is (8:2)-(9:1), a compound of fatty alcohol polyoxyethylene ether and octylphenol polyoxyethylene is selected as an emulsifier, the mass percentage of fatty alcohol polyoxyethylene ether is 30%-50%, and the mass percentage of octylphenol polyoxyethylene is 50%-70%; the polymerization reaction temperature is 70-85 DEG C, the pressure is lower than or equal to 1.5 Mpa, and the curing temperature is 70-82 DEG C; the content of gel in the produced styrene-butadiene latex product is higher than 80%; the particle size is 0.06-0.15 mu m. The styrene-butadiene latex which has the styrene content exceeding 80% and is used for powdered rubber can be produced through selection of the emulsifier, control on polymerization reaction pr