The present invention provides a method for preparing hydrophilic polymer foam. The method comprises a step of providing an isocyanate functionalized prepolymer (A) and a step of foaming and curing the prepolymer (A). The prepolymer (A) is prepared by reacting diisocyanate (A1) and polyether polyol (A2), wherein the diisocyanate (A1) is selected from any one and a combination of 1,4-butyl diisocyanate (BDI), lysine diisocyanate (LDI) and 1,5-pentyl diisocyanate (PDI); the polyether polyol (A2) is a copolymer of ethylene oxide (EO) and propylene oxide (PO) and/or butylene oxide (BO); the ethylene oxide has a weight percentage of about 50%-100% in the polyether polyol, and has an OH functionality degree of 3-6, a hydroxyl value of about 21 mg KOH/g-168 mg KOH/g and a number-average molecular weight of about 1000 g/mol to about 8000 g/mol; and NCO content in the prepolymer (A) is 1%-10%.
本发明提供了一种制备亲
水性聚合物泡沫的方法。该方法包括提供
异氰酸酯官能化预聚物(A)的步骤,以及发泡和固化预聚物(A)的步骤。预聚物 (A) 通过二
异氰酸酯 (A1) 和聚醚多元醇 (A2) 反应制备,其中二
异氰酸酯 (A1) 选自 1,4-丁基二
异氰酸酯 (BDI)、赖
氨酸二
异氰酸酯 (LDI) 和 1,5-戊基二
异氰酸酯 (PDI) 中的任意一种或其组合;聚醚多元醇(A2)是
环氧乙烷(
EO)和环氧
丙烷(PO)和/或环氧丁 烷(BO)的共聚物;
环氧乙烷在聚醚多元醇中的重量百分比约为 50%-100%,其羟基官能度为 3-6,羟基值约为 21 毫克 KOH/g-168 毫克 KOH/g,数均分子量约为 1000 克/摩尔至约 8000 克/摩尔;预聚物(A)中的 NCO 含量为 1%-10%。