知搜-全球专利检索

  1. 登录
  2. 注册
发明授权
CN101516936B 制备聚苯乙烯的方法 有权 转让

制备聚苯乙烯的方法
摘要：
本发明涉及制备聚苯乙烯的方法，特别是制备高抗冲聚苯乙烯的方法，该方法包括：1)向预转化反应器中引入苯乙烯单体、橡胶聚合物和接枝促进剂，并聚合苯乙烯单体形成聚苯乙烯，所述聚合进行到转化率为形成的苯乙烯/聚苯乙烯/橡胶聚合物混合物的相转化起始点的70到100％，2)分离形成的苯乙烯/聚苯乙烯/橡胶聚合物混合物，以生成包含占所形成混合物重量70到95wt％的第一物流以及包含余量所形成平衡混合物的第二物流，3)将第一物流引入到第二反应器中，其中进行进一步的苯乙烯聚合以引起第一物流的相转化，4)将步骤(3)中的相转化第一物流和步骤(2)中的第二物流以5到30s-1的剪切速率在静态在线混合机中混合，以引起第二次相转化，并生成具有橡胶颗粒双峰分布的高抗冲聚苯乙烯。
摘要（英）：

The present invention relates to a process for producing a polystyrene, in particular a process for producing a high impact polystyrene, which process comprises: 1) introducing into a pre-inversion reactor a styrene monomer, a rubber polymer and a grafting promoter, and polymerising the styrene monomer to form a polystyrene, said polymerisation being performed to a conversion of between 70 and 100% of the phase inversion start point of the styrene/polystyrene/rubber polymer mixture formed, 2) splitting the formed styrene/polystyrene/rubber polymer mixture to produce a first stream comprising 70 to 95% by weight of the formed mixture and a second stream comprising the balance of the formed mixture, 3) introducing the first stream into a second reactor wherein further styrene polymerisationis performed to cause phase inversion the first stream, 4) mixing the phase inverted first stream from step (3) with the second stream from step (2) at a shear rate of 5 to 30 s <-1> in a static in-line mixer to cause a second phase inversion and produce a high impact polystyrene with a bimodal distribution of rubber particles.

公开/授权文献
0/0