Coating material water repellent agent, preparation method and applications thereof
A coating water-resistant agent and material liquid technology, applied in the direction of paper forming additives, organic chemistry, etc., can solve environmental problems and other problems, achieve excellent surface strength, easy industrial production, and broad application prospects
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Embodiment 1
[0029] 1.1mol of glycerol is added to a three-necked flask equipped with a stirrer, a thermometer and a condenser, and 0.02mol of concentrated sulfuric acid (80wt%) is added. Under stirring, 3.0mol of epichlorohydrin is added, stirred, and heated to 80 ℃, and reacted at 80°C for 90min, lowered the temperature of the system to 40°C, added 3.6mol sodium hydroxide, raised the temperature to 80°C and reacted for 80min, adjusted the pH value to 7.5 with 80wt% sulfuric acid, then lowered the temperature of the feed liquid to 60°C, add 0.4mol ammonia water, raise the temperature to 80°C, and react at 80°C for 120min, adjust the solid content of the feed liquid to 60wt% with deionized water, then add 80wt% sulfuric acid to adjust the pH of the feed liquid to 8.0, cool The feed liquid is heated to 40° C. to obtain an aqueous solution containing a multi-epoxy functional group resin, that is, a water repellent agent for paint.
[0030] After testing, the viscosity of the aqueous solution...
Embodiment 2
[0033]Add 1.0mol of glycerol to a three-necked flask equipped with a stirrer, a thermometer and a condenser, add 0.01mol of concentrated sulfuric acid (98wt%), and under stirring, add 3.0mol of epichlorohydrin, stir, and heat up to 75 ℃, and reacted at 75℃ for 80min, lowered the system temperature to 40℃, added 3.3mol potassium hydroxide, raised the temperature to 75℃, kept the temperature for 60min, adjusted the pH value to 7.5 with 65% (wt) sulfuric acid, and then lowered the The temperature of the liquid is 50°C, add 0.35mol ammonia water, raise the temperature to 70°C, and react at 70°C for 100min, adjust the solid content of the liquid in the step to 50wt% with deionized water, and then add hydrochloric acid to adjust the pH of the liquid to 7.0 , cooling the feed liquid to 30° C. to obtain an aqueous solution containing a multi-epoxy functional group resin, that is, a water repellent agent for paint.
[0034] After testing, the aqueous solution containing the multi-epoxy...
Embodiment 3
[0037] The glycerin of 0.9mol is joined in the there-necked flask that stirrer, thermometer and condenser are equipped with, the concentrated sulfuric acid (98wt%) of adding 0.002mol, under stirring situation, add 3.0mol epichlorohydrin, stir, be warming up to 70 ℃, and reacted at 70°C for 60min, lowered the system temperature to 40°C, added 3.0mol lithium hydroxide, raised the temperature to 70°C, kept the temperature for 45min, adjusted the pH value to 6.0 with 25% (wt) sulfuric acid, and then lowered the The temperature of the solution is 40°C, add 0.27mol ammonia water, raise the temperature to 65°C, and react at 65°C for 60 minutes, adjust the solid content of the feed solution to 40wt% with deionized water, and then add nitric acid to adjust the pH of the feed solution to 6.0 , cooling the feed liquid to 20° C. to obtain an aqueous solution containing a multi-epoxy functional group resin, that is, a water repellent agent for paint.
[0038] After testing, the aqueous sol...
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