Room-temperature rapid-curing polyurea adhesive and preparation method thereof
A technology of adhesive and polyurea, applied in the field of bonding solid buoyancy material modules
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Embodiment 1
[0022] Add 100 grams of polytetrahydrofuran ether glycol PTMG-1000 and 30 grams of polyoxypropylene glycol voranol 2120 into a three-necked reaction flask equipped with a stirrer, a thermometer, and a vacuum straw, heat up to 110°C--120°C, and dehydrate , Degassing for 1 hour. Cool down to 60°C--70°C, add 60 grams of toluene diisocyanate TDI-80 / 20. Slowly raise the temperature to 80°C, react at 80°C±2°C for 2 hours, take a sample to measure the isocyanate content NCO%, when it is close to the theoretical value, discharge the material to obtain the semi-prepolymer component A. The isocyanate content NCO% is 10.5%.
Embodiment 2
[0024] Add 100 grams of polytetrahydrofuran ether glycol PTMG-2000 and 30 grams of polyoxypropylene glycol voranol 2120 into a three-necked reaction flask equipped with a stirrer, a thermometer, and a vacuum straw, heat up to 110°C--120°C, and dehydrate , Degassing for 1 hour. Cool down to 60°C--70°C, add 100 grams of diphenylmethane diisocyanate MDI-50. Slowly raise the temperature to 80°C, react at 80°C±2°C for 2 hours, take a sample to measure the isocyanate content NCO%, when it is close to the theoretical value, discharge the material to obtain the semi-prepolymer component A. The isocyanate content NCO% is 10.2%.
Embodiment 3
[0026] Add 100 grams of polytetrahydrofuran ether glycol PTMG-1000 and 30 grams of polyoxypropylene glycol voranol 2110 into a three-necked reaction flask equipped with a stirrer, a thermometer, and a vacuum straw, heat up to 110°C--120°C, and dehydrate , Degassing for 1 hour. Cool down to 60°C--70°C, add 70 grams of diphenylmethane diisocyanate MDI-100, and 25 grams of polyphenyl polymethyl polyisocyanate PAPI. Slowly raise the temperature to 80°C, react at 80°C±2°C for 2 hours, take a sample to measure the isocyanate content NCO%, when it is close to the theoretical value, discharge the material to obtain the semi-prepolymer component A. The isocyanate content NCO% is 11.5%.
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