A process for producing a highly water absorptive polymer by polymerizing a water-soluble, ethylenically unsaturated monomer in a water-in-oil type of dispersion consisting of the dispersion phase of an aqueous monomer solution comprising the water-soluble, ethylenically unsaturated monomer, water, a water-soluble polymerization initiator and an optional water-soluble crosslinking agent and the continuous phase of an organic solvent containing a dispersant, characterized in that the aqueous monomer solution is added to the organic solvent at such a temperature as to form an oil-in-water type of dispersion, and the oil-in-water type of dispersion is then heated at least to a phase reversal temperature at which it is transformed into the water-in-oil type of dispersion.
一种通过在油包
水型分散体中聚合
水溶性
乙烯基不饱和单体来生产高吸
水性聚合物的工艺,该分散体的分散相为包含
水溶性
乙烯基不饱和单体、
水、
水溶性聚合
引发剂和任选
水溶性
交联剂的单体
水溶液,连续相为含有分散剂的有机溶剂、其特征在于,单体
水溶液在一定温度下加入有机溶剂,形成
水包油型分散体,然后将
水包油型分散体至少加热到相逆温度,在此温度下转变为油包
水型分散体。