| abstract |
(57) [Summary] [Purpose] The present invention has an extremely high curing rate when used in the air, and has a small decrease in hardness after swelling even though it has a large swelling rate when immersed in water, and after swelling. The object of the present invention is to provide a hydrophilic one-pack type polyurethane composition having excellent properties such as good shape retention, low solubility even at high temperature and no hydrolysis. [Structure] A hydrophilic one-pack type polyurethane composition of the present invention, A waterproof material, a wall material, a floor pavement material, and a water-swellable ceiling made of the same composition are (a) a polyether polyol containing an oxyethylene chain in an oxyalkylene chain in an amount of 10% by weight or more and an organic polyisocyanate compound. To a hydrophilic urethane prepolymer having a terminal isocyanate group content of 1 to 20% by weight, which reacts with (b) does not substantially react with the (b) isocyanate group to generate a primary or secondary amino group due to water. A composition comprising a block amine compound. |