Process for producing an oil and water absorbent polymer capable of entrapping solid particles and liquids and the product thereof
申请人:AMCOL INTERNATIONAL CORPORATION
公开号:EP0863161A2
公开(公告)日:1998-09-09
The present invention is directed to a porous polymer microparticle, in the form of broken spheres, open to a porous oleophilic interior surface area, having a high oil and water absorbency and an apparent bulk density of about 0.008 to about 0.1 grams/cc. The preferred method of the present invention comprises the steps of:
dissolving at least one, and preferably at least two, polyunsaturated monomers along with an effective amount of an organic polymerization initiator in a water-immiscible organic solvent to provide a monomer mixture;
adding the monomer mixture to an aqueous solution, preferably having an effective amount of a suspension stabilizer dissolved therein, to form an organic/aqueous biphasic liquid system;
vigorously agitating the biphasic liquid system at a rate sufficient to cause the water-immiscible organic phase to be suspended as microdroplets in the aqueous phase;
continuing vigorous agitating during polymerization of the monomers in the suspended microdroplets to produce a microporous polymer microparticle; and
separating the microporous polymer microparticle from the organic solvent to produce a microporous and oil sorbent polymer microparticle having a mean unit diameter of less than about 50 microns and a total sorptive capacity for mineral oil that is at least about 72% by weight, preferably at least about 90% by weight dry polymer basis.
本发明涉及一种多孔聚合物微粒,其形式为碎球体,具有多孔亲油性内表面积,具有较高的吸油和吸水性,表观体积密度约为 0.008 至约 0.1 克/cc。本发明的优选方法包括以下步骤:
将至少一种(最好至少两种)多不饱和单体与有效量的有机聚合引发剂一起溶解在不溶于水的有机溶剂中,以提供单体混合物;
将单体混合物加入水溶液(最好溶解有有效量的悬浮稳定剂)中,形成有机/水 双相液体体系;
以足以使不溶于水的有机相以微滴形式悬浮在水相中的速度,剧烈搅拌双相液体体系;
在悬浮微滴中的单体聚合过程中继续剧烈搅拌,以产生微孔聚合物微粒;以及
将微孔聚合物微粒从有机溶剂中分离出来,制得微孔吸油聚合物微粒,其平均单位直径小于约 50 微米,对矿物油的总吸附能力至少约为 72%(按重量计),最好至少约为 90%(按干聚合物重量计)。