| abstract |
PROBLEM TO BE SOLVED: To provide a polyurethane porous body having a very uniform porous structure throughout a layer, having fine continuous pores, excellent water absorption speed, and good dimensional stability when wet, even if it is a thick porous body Providing a body. A polyurethane resin emulsion is used as a crosslinking agent for a water-soluble urethane prepolymer as 3,9-bis (3-aminopropyl) -2,4,8,10-tetraoxaspiro [5,5] undecene or 1, A polyurethane porous body obtained by cross-linking reaction in the presence of a water-soluble polymer compound using 4-bis (3-aminopropyl) piperazine, followed by gelation, and a water-soluble urethane prepolymer, A polyurethane porous body characterized in that the terminal isocyanate group is a water-soluble urethane prepolymer masked with sodium bisulfite. [Selection figure] None |