A kind of white polyurea waterproof coating and its application
A waterproof coating, white technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of material aging, high energy consumption, high ultraviolet light intensity, and achieve the effects of excellent waterproof, reduced energy consumption, and high light reflectivity
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Embodiment 1
[0018] 1. Preparation of white polyurea waterproof coating
[0019] (1) Preparation of prepolymer A component
[0020] Isophorone diisocyanate (IPDI), phosphoric acid and dibutyltin dilaurate were uniformly mixed in a mass ratio of 100:0.2:0.2 in advance to prepare diisocyanate mixture 1, which was used in the following synthesis process.
[0021] Add 5% PPG500 and 30% PPG2000 into the reactor, dehydrate under reduced pressure at 100°C for 1-3 hours, take samples to measure the moisture content, stop dehydration when the moisture content reaches below 0.08%, cool to 80°C and maintain at At this temperature, add 5% of the diisocyanate mixture 1 dropwise to the kettle while stirring. After the dropwise addition, continue the reaction at 80°C for 2 hours; then add the remaining 60% of the diisocyanate mixture 1 dropwise at this temperature, dropwise After the addition, continue to keep warm for 4 hours, cool to 40°C, discharge and seal in a container to obtain prepolymer compone...
Embodiment 2
[0028] 1. Preparation of white polyurea waterproof coating
[0029] (1) Preparation of prepolymer A component
[0030] Hexamethylene diisocyanate (HDI), phosphoric acid and dibutyltin dilaurate were uniformly mixed in a mass ratio of 100:0.2:0.2 in advance to prepare diisocyanate mixture 2, which was used in the following synthesis process.
[0031] Add 6% PPG500 and 30% PPG2000 into the reactor, dehydrate under reduced pressure at 100°C for 1-3 hours, take samples to measure the moisture content, stop dehydration when the moisture content reaches below 0.08%; cool to 80°C and maintain at At this temperature, add 5% of the diisocyanate mixture 2 dropwise to the kettle while stirring. After the dropwise addition, continue the reaction at 80°C for 2 hours; then add the remaining 59% of the diisocyanate mixture 2 dropwise at this temperature, drop After the addition, continue to keep warm for 4 hours, cool to 40°C, discharge and seal in a container to obtain prepolymer component...
Embodiment 3
[0038] 1. Preparation of white polyurea waterproof coating
[0039] (1) Preparation of prepolymer A component
[0040] Hexamethylene diisocyanate (HDI), phosphoric acid and dibutyltin dilaurate were uniformly mixed in a mass ratio of 100:0.2:0.2 in advance to prepare diisocyanate mixture 2, which was used in the following synthesis process.
[0041] Add 6% PPG500 and 30% PPG2000 into the reactor, dehydrate under reduced pressure at 100°C for 1-3 hours, take samples to measure the moisture content, stop dehydration when the moisture content reaches below 0.08%; cool to 80°C and maintain at At this temperature, 5% diisocyanate mixture 2 was added dropwise to the kettle while stirring. After the dropwise addition was completed, the reaction was continued at 80° C. for 2 h. Then at this temperature, the remaining 59% of the diisocyanate mixture 2 was added dropwise. After the dropwise addition, the heat preservation reaction was continued for 4 hours, cooled to 40° C., discharged...
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