公开(公告)号：US4758639A

公开(公告)日：1988-07-19

申请号：US94020

申请日：1987-09-03

申请人： Shunichi Koyanagi ,  Hajime Kutamura ,  Toshihide Shimizu ,  Ichiro Kaneko

发明人： Shunichi Koyanagi ,  Hajime Kutamura ,  Toshihide Shimizu ,  Ichiro Kaneko

IPC分类号： C08F2/00 ,  C08F2/18 ,  C08F2/22 ,  C08F2/44

CPC分类号： C08F2/004

摘要： A process for production of a vinyl polymer by suspension polymerization or emulsion polymerization of at least one kind of vinyl monomer in an aqueous medium is disclosed.In this process, the polymerization is carried out in a polymerizer, the inner wall surface and portions of the auxiliary equipment thereof which may come into contact with the monomer during polymerization having a surface roughness of not greater than 5 .mu.m and being previously coated with a scaling preventive comprising at least one selected from dyes, pigments and aromatic or heterocyclic compounds having at least 5 conjugated .pi. bonds. According to this process, scaling on the inner wall surface of a polymerizer, etc. during polymerization can be prevented effectively and surely.

摘要翻译： 公开了通过在水性介质中悬浮聚合或至少一种乙烯基单体的乳液聚合制备乙烯基聚合物的方法。 在该方法中，聚合反应在聚合反应器中进行，其内壁表面及其辅助设备的部分可在聚合过程中与单体接触，表面粗糙度不大于5μm，并预先涂覆 防垢剂包含选自染料，颜料和具有至少5个共轭π键的芳族或杂环化合物中的至少一种。 根据该方法，可以有效且可靠地防止聚合反应器内壁表面的缩小。