About 87% of the production capacity of styrene-butadiene rubber in the world adopts emulsion polymerization. Usually, styrene-butadiene rubber mainly refers to emulsion polymerized styrene-butadiene rubber. Emulsion polymerized styrene-butadiene rubber includes hot styrene-butadiene emulsion polymerization at high temperature and cold styrene-butadiene emulsion polymerization at low temperature. The former was industrialized in 1942, and there is still a small amount of production at present, which is mainly used in cement, adhesive, chewing gum, and some fabric coated molded products and mechanical products.
The so-called styrene-butadiene rubber mainly refers to styrene-butadiene rubber produced by low-temperature emulsion polymerization, 1947 industrialization. It has comprehensive properties such as high wear resistance, high tensile strength and good processability, and is the largest and most widely used synthetic rubber variety at present.
It seems that some products can be used in chewing gum without toxicity. Ordinary styrene-butadiene rubber is used as industrial raw material, not food-grade raw material. Like other non-food grade raw materials, it must be toxic.