公开(公告)号：USRE33284E

公开(公告)日：1990-07-31

申请号：US126907

申请日：1987-11-30

申请人： Kenichi Itoh ,  Genji Noguki ,  Motoaki Tanaka ,  Hitoshi Ohba ,  Masahiko Watase

发明人： Kenichi Itoh ,  Genji Noguki ,  Motoaki Tanaka ,  Hitoshi Ohba ,  Masahiko Watase

IPC分类号： C08F2/00 ,  C08F2/18 ,  C08F2/20 ,  C08F14/00 ,  C08F14/06 ,  C08F265/00 ,  C08F265/02 ,  C08F267/02

CPC分类号： C08F14/06

摘要： The invention provides an improvement in the suspension polymerization of vinyl chloride in an aqueous medium in the presence of a monomer-soluble polymerization initiator, according to which the amount of polymer scale deposition on the reactor walls can be greatly decreased. The improvement comprises admixing the aqueous polymerization medium with (a) a water-soluble crosslinked copolymer of an unsaturated carboxylic acid monomer, e.g. acrylic acid, and a crosslinking monomer such as di(methyl)allyl ether of diethyleneglycol and (b) a non-ionic surface active agent in combination.

公开(公告)号：US4694053A

公开(公告)日：1987-09-15

申请号：US748433

申请日：1985-06-25

申请人： Kenichi Itoh ,  Genji Noguki ,  Motoaki Tanaka ,  Hitoshi Ohba

发明人： Kenichi Itoh ,  Genji Noguki ,  Motoaki Tanaka ,  Hitoshi Ohba

IPC分类号： C08F2/00 ,  C08F2/18 ,  C08F2/20 ,  C08F14/00 ,  C08F14/06 ,  C08F265/00 ,  C08F265/02 ,  C08F267/02 ,  C08L37/00

CPC分类号： C08F14/06

摘要： The invention provides an improvement in the suspension polymerization of vinyl chloride in an aqueous medium in the presence of a monomer-soluble polymerization initiator, according to which the amount of polymer scale deposition on the reactor walls can be greatly decreased. The improvement comprises admixing the aqueous polymerization medium with (a) a water-soluble crosslinked copolymer of an unsaturated carboxylic acid monomer, e.g. acrylic acid, and a crosslinking monomer such as di(methyl)allyl ether of diethyleneglycol and (b) a non-ionic surface active agent in combination.

摘要翻译： 本发明提供了在单体可溶性聚合引发剂存在下，水性介质中氯乙烯在悬浮聚合中的改进，根据该聚合引发剂，反应器壁上的聚合物垢沉积量可以大大降低。 改进之处在于将水性聚合介质与（a）不饱和羧酸单体的水溶性交联共聚物， 丙烯酸和交联单体如二乙二醇的二（甲基）烯丙基醚和（b）非离子表面活性剂的组合。

公开(公告)号：US4500649A

公开(公告)日：1985-02-19

申请号：US433690

申请日：1982-10-12

申请人： Motoaki Tanaka ,  Takanori Toyama ,  Hitoshi Ohba ,  Osamu Yamaguchi

发明人： Motoaki Tanaka ,  Takanori Toyama ,  Hitoshi Ohba ,  Osamu Yamaguchi

IPC分类号： C08F2/18 ,  C08F4/04 ,  B01J31/06

CPC分类号： C08F4/04 ,  C08F2/18

摘要： A stable aqueous suspension containing an organic azo compound as polymerization initiator in fine particles, containing substantially no organic solvent and containing no foam which damages dispersing stability of the aqueous suspension and retards polymerization rate can be formed by dissolving an organic azo compound in an organic solvent, emulsifying the resulting solution by adding water and a dispersing agent A and a dispersing agent B thereto with stirring, and removing the organic solvent from the emulsified liquid preferably under reduced pressure.

摘要翻译： 含有有机偶氮化合物作为聚合引发剂的稳定的水性悬浮液可以通过将有机偶氮化合物溶解在有机溶剂中来形成细小颗粒中的基本上不含有机溶剂并且不含泡沫的聚合引发剂，其破坏水悬浮液的分散稳定性并延缓聚合速率 通过在搅拌下加入水和分散剂A和分散剂B将所得溶液乳化，优选在减压下从乳化液中除去有机溶剂。