公开(公告)号：US4539380A

公开(公告)日：1985-09-03

申请号：US513905

申请日：1983-07-14

申请人： Cheng-Yi Cheng ,  Shou-Yuan Lee ,  Kwang-Ming Chen ,  Won-Doon Hong

发明人： Cheng-Yi Cheng ,  Shou-Yuan Lee ,  Kwang-Ming Chen ,  Won-Doon Hong

IPC分类号： C08F2/00 ,  C08F2/16

CPC分类号： C08F2/16

摘要： The present invention relates to a polymerization process for polymerizing olefinically unsaturated monomer or monomers, wherein inorganic salts are employed to substitute for the traditional emulsifiers employed in the polymerization recipe. The polymerization of olefinically unsaturated monomer or monomers is conducted in the presence of a water soluble initiator. An electrolytic solution of inorganic salt and a buffer solution are introduced into the polymerization mixture at a particular time during reaction period to adequately adjust pH value of the reaction mixture. Further, it is essential to alter the speed of agitation during polymerization by a two-stage operation. The polymer resins so produced have no emulsifier residue contained within the polymer particles, whereby the properties of plastisols from these resins such as viscosity stability, heat stability and clarity are superior to those of the polymer resins produced by conventional emulsion polymerization process or microsuspension polymerization process. The monomer/water ratio of the polymerization recipe thereof is also improved, whereby productivity per batch or run of polymerization is increased.

摘要翻译： 本发明涉及用于聚合烯属不饱和单体或单体的聚合方法，其中使用无机盐代替在聚合配方中使用的传统乳化剂。 烯属不饱和单体或单体的聚合在水溶性引发剂的存在下进行。 在反应期间的特定时间将无机盐和缓冲溶液的电解液引入聚合混合物中，以充分调节反应混合物的pH值。 此外，必须通过两阶段操作来改变聚合期间的搅拌速度。 如此制造的聚合物树脂在聚合物颗粒内不含有乳化剂残留物，因此这些树脂的增塑溶胶的性质如粘度稳定性，热稳定性和澄清度优于常规乳液聚合方法或微悬浮聚合方法制备的聚合物树脂 。 其聚合配方的单体/水比也得到改善，从而增加了每批次或聚合行程的生产率。