Environment-friendly oil-extended styrene-butadiene rubber and preparation method thereof

The invention provides environment-friendly oil-extended styrene-butadiene rubber and a preparation method thereof. The preparation method comprises the step of blending styrene-butadiene rubber and filling oil, the filling oil comprises C20-C30 aromatic hydrocarbon or cycloalkane, water and a first emulsifier, and the weight ratio of the styrene-butadiene rubber to the filling oil is 100: (35.5-41.5). Compared with aliphatic hydrocarbon, C20-C30 aromatic hydrocarbon and C20-C30 cycloalkane have good intermiscibility with butadiene styrene rubber so that the prepared butadiene styrene rubber product has good processability. According to the preparation method, the filling oil with specific composition does not contain carcinogenic aromatic hydrocarbon and polycyclic aromatic hydrocarbon, or the content of polycyclic aromatic hydrocarbon is low so that the environmental protection performance of the environment-friendly oil-extended styrene butadiene rubber is improved. 本发明提供了一种环保型充油丁苯橡胶及其制备方法。该制备方法包括将丁苯橡胶和填充油