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The preparation method of a high rigidity chlorinated polyethylene

The preparation method of a high rigidity chlorinated polyethylene


  Patent no: ZL 200910229836.8
  Patent introduction: this invention discloses the preparation method of a high rigidity chlorinated polyethylene by hydrochloric acid method.Include the following steps:under mixing condition,put high density polyethylene,dispersant and anti tack agent into hydrochloric acid solution,acquire suspended solution;Add chlorination into the suspended solution which is divided into two sections to conduct chlorination reactions.Set the reaction temperature at 30 ~ 140 ℃.Chlorine volume is 0.5 ~ 1.2 times of the high density polyethylene.Reaction time is 3 ~ 5 h.After that,separation, washing,dehydration and desiccation the chlorinated compounds,get the high rigidity chlorinated polyethylene products that chlorine content is 20 ~ 35 wt %, DSC is 5  j/g or less,shore hardness is 60 ~ 80 100% fixed stretch modulus > 2.0 MPa.The high rigidity chlorinated polyethylene produced by this invention,could replace MBS with high price.As the impact modifier of rigid PVC products,could satisfy materials’  needs to rigidity and toughness.