Modification of trans-1,4-polyisoprene through chlorination

The process of aqueous suspension was used in modification of trans-1,4-polyisoprene through chlorination at ambient pressure.The effects of temperature,time,particle size on the chlorine content of CTPI were investigated.The suitable reaction conditions were as follows.The two-step method of raising temperature was used and chlorine flow rate was controlled quantificationally.In the first phase,reaction temperature:35?℃,reaction time:2～3 h;in the second phase,reaction temperature: 50～55?℃,reaction time: 1～6 h,CTPI with an chlorine content under 50% could be obtained.The output are white loose soluble particles.