Chemic grouting polyurethane material, prepolymer thereof and preparation method
A technology for polyurethane chemistry and grouting materials, applied in the field of polyurethane chemical grouting materials and their prepolymers, can solve the problems of unsatisfactory bond strength, tensile strength, anti-permeability and water-inclusion performance, high toxicity and volatility of isocyanates, etc. , to achieve the effect of high compressive strength and cost reduction
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[0038] Example 1
[0039] The preparation method of the prepolymer: Mix 0.688 parts of polyether polyol 480, 0.076 parts of polyether DL1000D and 0.00002 parts of phosphoric acid, replace the air with nitrogen 3 times, control the temperature of the reactor at 50°C, and add 0.236 parts of MDI-50 in a sealed manner. Replace the air with nitrogen 3 times, react at 50°C for 2 hours under normal pressure, and then react at 85°C for 3 hours to obtain a prepolymer;
[0040] The preparation method of polyurethane chemical grouting material: under anhydrous conditions, cool 1 part of the above-mentioned prepolymer to room temperature, add 0.25 part of anhydrous acetone, 0.08 part of anhydrous dioctyl phthalate, 0.01 part of DMDEE, and 0.01 parts of Tween 80 and stirring for 20 minutes to obtain polyurethane chemical grouting material, the content of -NCO is 4.4%, and the specific parameters are shown in Table 1.
[0041] Table 1
[0042] project
[0043] Tensile strength (MPa)
Example Embodiment
[0044] Example 2
[0045] The preparation method of the prepolymer: mix 0.663 parts of polyether 480, 0.074 parts of polyether DL1000D and 0.00002 parts of tartaric acid, replace the air with nitrogen 3 times, control the temperature of the reactor at 60℃, and add 0.236 parts of MDI-50 in a sealed manner, and then use Replace the air with nitrogen 3 times, react at 60°C for 2 hours under normal pressure, and then react at 80°C for 3 hours to obtain a prepolymer;
[0046] The preparation method of polyurethane chemical grouting material: under anhydrous conditions, cool 0.973 parts of the prepolymer to room temperature, add 0.20 parts of anhydrous methyl ethyl ketone, 0.05 parts of anhydrous triphenyl phosphate, 0.012 parts of DMDEE, and Tween 60 0.01 parts, stirring for 20 minutes to obtain polyurethane chemical grouting material, in which the content of -NCO is 5.5%, and the specific parameters are shown in Table 2.
[0047] Table 2
[0048] project
Example Embodiment
[0049] Example 3
[0050] Prepolymer preparation method: mix 0.686 parts of polyether 480, 0.036 parts of polyether DL1000D and 0.00002 parts of phosphoric acid, replace the air with nitrogen 3 times, control the temperature of the reactor at 50°C, and add 0.278 parts of MDI-50 in a sealed manner, and then use Replace the air with nitrogen 3 times, react at 50°C for 3 hours under normal pressure, and then react at 90°C for 2 hours to obtain a prepolymer;
[0051] The preparation method of polyurethane chemical grouting material: under anhydrous conditions, cool 1 part of the prepolymer to room temperature, add 0.20 parts of anhydrous acetone, 0.08 parts of anhydrous dioctyl phthalate, 0.015 parts of DMDEE and 0.01 parts of Tween 80 and stirring for 20 minutes to obtain polyurethane chemical grouting material, in which the content of -NCO is 6.0%, and the specific parameters are shown in Table 3.
[0052] table 3
[0053] project
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