公开(公告)号：US4744193A

公开(公告)日：1988-05-17

申请号：US927469

申请日：1986-11-06

申请人： Toshio Hatsuzaki ,  Yoshihiko Ogawa ,  Toshio Hiramatsu ,  Hideo Senga ,  Takehiko Tokoro

发明人： Toshio Hatsuzaki ,  Yoshihiko Ogawa ,  Toshio Hiramatsu ,  Hideo Senga ,  Takehiko Tokoro

IPC分类号： E04B1/66 ,  C08G18/16 ,  C08G18/30 ,  E02D3/12 ,  E02D31/04 ,  E03B11/14 ,  E04G23/02 ,  E02D31/02 ,  E02D37/00

CPC分类号： E02D31/04 ,  C08G18/168 ,  C08G18/302 ,  E02D3/12 ,  E04G23/02 ,  E04G23/0203 ,  C08G2190/00

摘要： A mixture consisting essentially of (1) an organic polyisocyanate compound and/or a prepolymer having terminal isocyanate residues, which is derived from the reaction of an organic polyisocyanate with a polyhydroxyl compound, and (2) 2-pyrrolidone, is injected for grouting into water-leaking cracks or openings of concrete structures such as water tanks, subway constructions and tunnels. The injected mixture diffuses into the cracks or openings and is cured in short time by reacting with water at the leaking sites. The resultant polyurethane foam securely seals the water leaking sites.

摘要翻译： 基本上由（1）有机多异氰酸酯化合物和/或具有末端异氰酸酯残基的预聚物（其衍生自有机多异氰酸酯与多羟基化合物的反应）和（2）2-吡咯烷酮组成的混合物被注入到 水泄漏裂缝或混凝土结构的开口，如水箱，地铁建筑物和隧道。 注入的混合物扩散到裂缝或开口中，并在短时间内通过与泄漏部位的水反应而固化。 所得的聚氨酯泡沫可以牢固地密封泄水部位。