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2. 发明授权

US06699964B1 Process for producing polymer particle 有权
标题翻译：生产聚合物颗粒的方法
公开(公告)号：US06699964B1
公开(公告)日：2004-03-02
申请号：US10049653
申请日：2002-06-12
申请人： Akihiro Toritani , Kouji Matsumura
发明人： Akihiro Toritani , Kouji Matsumura
IPC分类号： C08F622
CPC分类号： C08J3/16 , B29B15/04 , B29K2009/00 , B29K2009/06 , B29K2021/00 , B29K2105/0064 , C08F6/22 , C08F257/02 , C08F265/04 , C08F265/06 , C08F291/02 , C08J2351/04 , C08L51/04 , C08F220/14 , C08L2666/04
摘要： A production method of polymer particles produces graft polymer particles by contacting a coagulant with a polymer latex (A) obtained by graft polymerizing a monomer containing methylmethacrylate to a rubber-like polymer. The method comprises a coagulation step in which polymer latex (A) is discharged into a stirring tank from an immersed nozzle provided so that the cross-sectional surface area of the discharge portion is 40 mm2 or more and the direction of discharge is facing in the same direction as the flow in the stirring tank and so that the linear velocity at the nozzle outlet is a velocity of 50-350 mm/s, and contacted with a coagulant to coagulate the graft polymer and obtain a slurry liquid; and a solidification step in which the resulting slurry liquid is held at a temperature of 60-100° C. to solidify the coagulated graft polymer. According to the production method of the present invention, graft polymer particles having superior powder characteristics with few coarse particles and high bulk specific gravity can be obtained without requiring the use of organic solvent or special equipment. Accordingly, polymer particles having superior powder characteristics can be produced in a stable manner and at low cost.
摘要翻译：聚合物颗粒的制备方法通过使凝结剂与通过将含有甲基丙烯酸甲酯的单体接枝聚合到橡胶状聚合物而获得的聚合物胶乳（A）接触而产生接枝聚合物颗粒。该方法包括凝结步骤，其中聚合物胶乳（A）从设置成使得排出部分的横截面积为40mm 2以上并且排出方向为的浸渍喷嘴排出到搅拌槽中面向与搅拌槽中的流动相同的方向，使得喷嘴出口处的线速度为50-350mm / s的速度，并与凝结剂接触以使接枝聚合物凝结并获得浆液; 以及固化步骤，其中所得浆液保持在60-100℃的温度以固化凝固的接枝聚合物。根据本发明的制造方法，不需要使用有机溶剂或特殊设备，可以获得具有优异的粉末特性，粗颗粒少，体积比重高的接枝聚合物颗粒。因此，可以以稳定的方式和低成本地生产具有优异粉末特性的聚合物颗粒。

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