| abstract |
The invention discloses a repair resin for point repair of trenchless pipelines, comprising: component A: water-based silicate resin; component B: polyurethane monomer: 0-50wt.%, polyurethane prepolymer and Polyurethane resin: 0-60wt.%, functional additives: 0-50wt.%; wherein, the terminal functional groups of the polyurethane monomer, polyurethane prepolymer and polyurethane resin in the B component are all isocyanate groups, And the weight percentage of the isocyanate group is 10%-35%; wherein, the weight ratio of the A component and the B component is: 0.4-0.7:1, which has a very low viscosity at room temperature , to ensure adequate wetting of the reinforcing material, and that it has a sufficiently long processing time after mixing to infiltrating the reinforcing fibers. The invention also provides a method for preparing a repair resin for point repair of trenchless pipelines, which can be made on site at the construction site, and after being sent into the pipeline to be repaired, the construction efficiency is extremely high; the invention also provides a Application of a repair resin for trenchless pipe point repair. |