In order to meet increasingly strict environmental requirements and reduce the phosphorus content in the wastewater of styrene butadiene rubber production,Jilin Petrochemical Company has developed a phosphorus free formula production technology for styrene butadiene rubber.The influence of phosphorus free formula on the coagulation of SBR1502 latex was discussed from several aspects such as phosphorus content in the waste water,coagulation process,and product properties.The experimental results show that the phosphorus content in the mother liquor of styrene butadiene rubber SBR1502 phosphate free formula latex is close to zero after coagulation and meet environmental emission requirements.The higher the feeding level of phosphate free electrolyte,the greater the consumption of sulfuric acid during coagulation,and the faster the coagulation speed.After the aggregation of phosphorus free formula latex,the rubber particles are slightly smaller than those with phosphorus.By reducing the coagulation stirring speed,it is possible to avoid excessively small coagulation particles in phosphorus free formulas.The phosphorus free formula has little effect on the physical properties of styrene butadiene rubber SBR1502 product,meeting the standard for premium grade products.
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