| abstract |
Provided is a method for producing a hydrophilic polymer foam comprising providing an isocyanate functionalized prepolymer (A) and foaming and curing the prepolymer (A). The prepolymer (A) is obtained by reacting the diisocyanate (A1) and the polyether polyol (A2). The diisocyanate (A1) is 1,4-butane diisocyanate (BDI), lysine diisocyanate (LDI), 1, Any one selected from 5-pentamethylene diisocyanate (PDI) and combinations thereof, and the polyether polyol (A2) is a copolymer of ethylene oxide (EO) and propylene oxide (PO) and / or butylene oxide (BO). The polymer, ethylene oxide, has a content of about 50% -100% by weight in the polyether polyol, has an OH functionality of 3-6, and a hydroxy number of about 168 mgKOH / g-21 mgKOH / g. The number average molecular weight is about 1000 g / mol-8. Was 200 g / mol, in the prepolymer (A), NCO content of 1-10%. [Selection] Figure 1 |