Polyurethane external-wall thermal-insulation paint and preparation method thereof
A heat-insulating coating, water-soluble polyurethane technology, applied in antifouling/underwater coatings, reflective/signal coatings, coatings, etc., to achieve the effects of high temperature resistance, good weather resistance, and good softness
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Embodiment 1
[0038] First, 40 parts of polyurethane prepolymer, 1 part of N-methylolacrylamide, 2 parts of dibutyl phthalate, 0.5 parts of vinyl trichlorosilane, 10 parts of rutile titanium dioxide, and defoaming 0.1 part of methyl silicone oil; 5 parts of superfine calcium carbonate (300 mesh); 10 parts of mixed solvent (a mixture of lignin and ethylene glycol butyl ether with water, the weight ratio is 3:1:10); leveling agent polyacrylic acid The parts by weight of the ester is 1, and the yellow iron oxide is 2 parts, and the materials are prepared.
[0039] The production method is to add 2 kilograms of ethanol with a volume concentration of 50-70% per kilogram of N-methylolacrylamide to dissolve, and then mix it with polyurethane prepolymer in a reaction kettle. The reaction temperature is 80-150 ° C, and the reaction time is 1 After 1 hour, add vinyltrichlorosilane; continue to react for 2-5 hours; then add dibutyl phthalate, methyl silicone oil, superfine calcium carbonate, leveling ...
Embodiment 2
[0041] Firstly, 45 parts of polyurethane prepolymer, 2 parts of N-methylolacrylamide, 4 parts of dibutyl phthalate, 0.8 part of vinyl trichlorosilane, 15 parts of rutile titanium dioxide, 0.2 parts of antifoaming agent methyl silicone oil; 7 parts of superfine calcium carbonate (300 mesh); 12 parts of mixed solvent (a mixture of lignin and ethylene glycol butyl ether plus water, the weight ratio is 3:1:10); anti-settling agent Prepare 1 part of N-methylpyrrolidone solution of modified polyurea.
[0042] The production method is to add 2 kilograms of ethanol with a volume concentration of 50-70% per kilogram of N-methylolacrylamide to dissolve, and then mix it with polyurethane prepolymer in a reaction kettle. The reaction temperature is 80-150 ° C, and the reaction time is 1 After 1 hour, add vinyltrichlorosilane; continue to react for 2-5 hours; then add dibutyl phthalate, methyl silicone oil, superfine calcium carbonate, mixed solvent, anti-settling agent, and mix well to ob...
Embodiment 3
[0044] First, 50 parts of polyurethane prepolymer, 2 parts of N-methylolacrylamide, 5 parts of dibutyl phthalate, 1 part of vinyl trichlorosilane, 20 parts of rutile titanium dioxide, 0.3 parts of antifoaming agent methyl silicone oil; 10 parts of superfine calcium carbonate (300 mesh); 15 parts of mixed solvent (a mixture of lignin and ethylene glycol butyl ether plus water, the weight ratio is 3:1:10); antifreeze 1 part of 1,3-propanediol and 1 part of iron oxide red are prepared.
[0045] The production method is to add 2 kilograms of ethanol with a volume concentration of 50-70% per kilogram of N-methylolacrylamide to dissolve, and then mix it with polyurethane prepolymer in a reaction kettle. The reaction temperature is 80-150 ° C, and the reaction time is 1 After 1 hour, add vinyltrichlorosilane; continue to react for 2-5 hours; then add dibutyl phthalate, methyl silicone oil, superfine calcium carbonate, mixed solvent, propylene glycol, red iron oxide, and mix well to g...
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