公开(公告)号：US4181788A

公开(公告)日：1980-01-01

申请号：US908763

申请日：1978-05-23

申请人： Frank Wingler ,  Lothar Liebig ,  Gerd Wassmuth ,  Martin Ullrich ,  Manfred Hederich

发明人： Frank Wingler ,  Lothar Liebig ,  Gerd Wassmuth ,  Martin Ullrich ,  Manfred Hederich

IPC分类号： B01J19/24 ,  C08F2/00 ,  C08F2/02 ,  C08F6/00 ,  C08F6/28 ,  C08F6/10

CPC分类号： B01J19/243 ,  C08F6/28 ,  B01J2219/00094

摘要： A process for the production of thermoplastically processible moulding materials based on vinyl polymers of high chemical and molecular uniformity and having residual monomer contents of less than 0.1 mol % which comprises the steps of:(i) mass homogeneous phase polymerization of at least one vinyl monomer in a stirred continuously charged tank reactor to a conversion of from 25 to 60 mol %;(ii) directly concentrating the syrup consisting of residual monomers and vinyl polymer dissolved therein obtained from step (i) in a spiral tube evaporator at a temperature of from 60.degree. to 250.degree. C. and at a pressure of 100 m bar to 35 bar to obtain a solid content of vinyl polymer of from 40 to 90 mol %;(iii) directly charging the concentrate obtained from step (ii) to the inlet zone of a screw evaporator which consists of at least two sequential zones in order to effect further concentration, in which a first zone at a pressure of from 10 to 300 m bar and at a temperature of from 100.degree. to 250.degree. C. concentrates the vinyl polymer to a solid content of from 80 to 99 mol-%, and each subsequent zone at a pressure of 1 to 200 m bar and at a temperature of 150.degree. to 250.degree. C. concentrates the vinyl polymer to a solid content of at least 99.9 %; and(iv) recycling the residual monomers from step (ii) and the residual monomers from said first zone of the screw evaporator to the stirred and charged tank reactor without intermediate cleaning.

摘要翻译： 一种生产基于乙烯基聚合物的热塑性可加工成型材料的方法，其具有高的化学和分子均匀性并且具有小于0.1摩尔％的残余单体含量，其包括以下步骤：（i）至少一种乙烯基单体的均匀相聚合 在搅拌的连续加入的釜式反应器中以25至60mol％的转化率; （ii）将由步骤（i）获得的残留单体和乙烯基聚合物组成的糖浆直接浓缩在螺旋管式蒸发器中，温度为60-250℃，压力为100巴，至35巴 以获得40至90mol％的乙烯基聚合物的固体含量; （iii）将由步骤（ii）获得的浓缩物直接装入由至少两个顺序区组成的螺杆蒸发器的入口区域，以便进一步浓缩，其中第一区域的压力为10-300μm 并且在100至250℃的温度下将乙烯基聚合物浓缩至固体含量为80至99mol％，并且每个后续区域在1至200mbar的压力和150℃的温度下 DEG至250℃，将乙烯基聚合物浓缩至至少99的固体含量。