Energy-saving insulated flame-retardant water-proof corrosion-proof functional coating and preparation method thereof
A functional coating and coating technology, applied in anti-corrosion coatings, polyurea/polyurethane coatings, coatings, etc., can solve the problems of polluted environment, poor chemical resistance, single function, etc., achieve good compatibility, excellent performance, increase The effect of thermal insulation
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[0022] Example 1
[0023] In a reactor equipped with a stirrer, a thermometer and a reflux condenser, add 40 g of polyether polyol (molecular weight 2300), vacuum and dehydrate at 110°C for 1 hour, and add 18 g of isophorone diisocyanate to the temperature below 50°C. , Warm up to 80°C, react for 2 hours, add 3g of dimethylolpropionic acid, 1.2g of 1,4-butanediol, 0.3g of trimethylolpropane, and 0.12g of stannous octoate. Continue the reaction for 2 hours under stirring During the reaction, the viscosity of the reactant is controlled below 4000mPa.s by adding acetone to obtain a prepolymer, and then the temperature is reduced to about 40°C, and 2g of triethylamine is added to neutralize the prepolymer to form a salt to obtain the prepolymer; The material was discharged into the disperser, 117 g of deionized water was added under high-speed shear, and 90% of the volume of acetone was distilled out to obtain an aqueous polyurethane dispersion. Its performance is as follows: solid ...
Example Embodiment
[0024] Example 2
[0025] In a reactor equipped with a stirrer, a thermometer and a reflux condenser, add 40 g of polyether polyol (molecular weight 2100), vacuum for dehydration at 105°C for 1 hour, and reduce the temperature to below 50°C. Add isophorone diisocyanate 12.5 g, 6.2g 1,6-hexamethylene diisocyanate, heated to 80°C, reacted for 1 hour, added 2.3g dimethylolpropionic acid, 2.3g 1,4-butanediol, 0.3g glycerol, dibutyltin dilaurate 0.13g, continue to react for 3 hours under stirring. During the reaction, add acetone to control the viscosity of the reactant below 4000mPa.s to obtain a prepolymer, then cool to about 35°C, add 1.5g of triethylamine to make the prepolymer The prepolymer is obtained by neutralization and salt formation; the prepolymer is discharged into the disperser, 125 g of deionized water is added under high-speed shear, and 90% of the volume of acetone is distilled out to obtain an aqueous polyurethane dispersion. Its performance is as follows: solid co...
Example Embodiment
[0026] Example 3
[0027] In a reactor equipped with a stirrer, a thermometer, and a reflux condenser, add 40g of polyether polyol (molecular weight 1800), vacuum and dehydrate at 105°C for 1 hour, and add 18g of dicyclohexylmethane diisocyanate to the temperature below 50°C. , Heated to 75°C, reacted for 1 hour, added 3.5g of dimethylolpropionic acid, 1.7g of 1,4-butanediol, 0.2g of stannous octoate, and continued to react for 3 hours under stirring to obtain a prepolymer. During the reaction, the viscosity of the reactant was controlled below 4000mPa.s by adding acetone, and then the temperature was lowered to about 35°C, and 3.2g of triethylamine was added to neutralize the prepolymer into a salt; discharge to the disperser, under high-speed shear 101 g of deionized water was added, and 90% of the volume of acetone was distilled off to obtain an aqueous polyurethane dispersion. Its performance is as follows: solid content: 37.3%; PH value: 7.2; viscosity (coating-4 cup / 25°C):...
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