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Study on Formulation of PU Resin for Pipeline Lining Rehabilitation Technology

The mixture ratio between host crystal and curing agent of PU resin was calculated adopting the particle reaction principle based on the same equivalent weight, the results show that the mixture ratio between host crystal and curing agent of PU resin is 100:20～26; then through the analysis of DSC cures, viscosity-temperature cures, viscosity-time cures and the gelatin time under 25°C, the best mixture ratio of 100:20 was confirmed whose curing process and viscosity can well meet the requirements of the pipeline lining rehabilitation technology; in order to test and verify its operational performance, the adhesive strength between the resin and the pipeline wall was simulated and tested, the results show that the adhesive strength of the resin whose mixture ratio is 100:20 is high, that can meet the requirements of the pipeline lining rehabilitation technology.