溴化丁基橡胶乳化工艺技术研究

采用乳化工艺制备了溴化丁基橡胶（BIIR）胶乳，研究了乳化剂种类、BIIR正己烷溶液浓度、乳化时间、乳化转速、胶乳体系pH值及蒸馏方式对BIIR胶乳的影响。结果表明，乳化BIIR的最佳条件为:BIIR正己烷溶液中BIIR质量分数为15.00%，体系pH值调节至11～12，高速剪切乳化时间为30 min，高剪转速为5 500～6 000 r/min，采用负压（压力为-0.04 MPa）旋转蒸馏，所得BIIR胶乳的蒸馏破乳率较低，且总固物质量分数可以达到45.00%以上；使用质量分数为20%的氯化钙溶液破乳成膜效果最佳。

Study on emulsifying technology of brominated butyl rubber

Brominated butyl rubber (BIIR) latex was prepared by emulsification process, and the effects of emulsifier type, concentration of BIIR n-hexane solution, emulsification time, emulsification speed, pH value of latex system and distillation method on BIIR latex were studied. The results showed that the optimal conditions for emulsifying BIIR were that mass fraction of BIIR of 15.00% in n-hexane solution, the pH value of the latex system of 11-12, the high-speed shear emulsification time of 30 min, the high-speed shear speed of 5 500-6 000 r/min, and the negative-pressure rotary distillation (pressure of -0.04 MPa), and the demulsification rate of the resulting BIIR latex was low and mass fraction of the total solid could reach more than 45.00%. The best demulsification and film-forming effect was obtained by using mass fraction of 20% calcium chloride solution.