METHOD OF MODIFYING HYDROPHILIC POLYMER AND PROCESS FOR PRODUCING HYDROPHILIC POLYMER RESIN
申请人:NIPPON SHOKUBAI CO., LTD.
公开号:EP0819721A1
公开(公告)日:1998-01-21
A hydrophilic polymer is denatured with a gaseous denaturant or a powdery denaturant substance made from a liquid denaturant substance. The liquid denaturant substance is made into powders by, for example, a method of mixing the liquid denaturant substance with a water-insoluble compound, a method of cooling the liquid denaturant substance to or below its melting point to turn the same into a solid state. Consequently, the hydrophilic polymer can be denatured uniformly. In case that the hydrophilic polymer is denatured with a gaseous denaturant, the hydrophilic polymer and denaturant react with each other efficiently in a safe manner regardless of the size or shape of the hydrophilic polymer. In case that the hydrophilic polymer is denatured with the powdery denaturant substance, not only the liquid denaturant substance which is substantially in the solid state can be mixed with the hydrophilic polymer, but also the denaturation timing can be readily controlled.
亲水性聚合物用气态变性剂或液态变性剂制成的粉末状变性剂物质进行变性。将液态变性剂物质制成粉末的方法包括:将液态变性剂物质与水不溶性化合物混合;将液态变性剂物质冷却至熔点或熔点以下,使其变成固态。这样,亲水性聚合物就能均匀地变性。如果亲水性聚合物用气态变性剂变性,则无论亲水性聚合物的大小或形状如何,亲水性聚合物和变性剂都能以安全的方式有效地相互反应。如果用粉末状变性剂对亲水性聚合物进行变性,则不仅可以将基本呈固态的液态变性剂与亲水性聚合物混合,而且还可以很容易地控制变性时间。