Preparation and application of zirconium-doped silica polymer sol and its antireflection and antireflection coating solution
A technology of silica and coating solution, which is applied to biocide-containing paints, polyurea/polyurethane coatings, coatings, etc., can solve the problems of poor dirt resistance and low light transmittance, and achieve surface density and increase Effects of light transmittance, high porosity and mechanical strength
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[0034] The present invention also provides a preparation method of zirconium-doped silica polymer sol, which comprises the following steps:
[0035] (1) Put alkoxysilane, zirconium salt and solvent in a reaction vessel at 40-80°C to obtain liquid A;
[0036] (2) adding water and acid into liquid A for reaction, and aging at room temperature to obtain a zirconium-doped silica polymer sol.
[0037] Wherein, adding water and acid into liquid A refers to slowly dropping into liquid A within 0.5-2 hours, and the reaction time is 1-2 hours.
[0038] Wherein, the aging time is 1-5 days.
[0039] The present invention also provides an anti-reflection and anti-reflection coating solution, which is formed by compounding raw materials containing zirconium-doped silica polymer sol, polymer emulsion and water, wherein the zirconium-doped silica is polymerized The mass content ratio of matter sol: polymer emulsion: water is 10-25%: 1-10%: 65-89%.
[0040] Wherein, the high molecular poly...
Embodiment 1
[0048] (1) Preparation of zirconium-doped silica polymer sol
[0049] (1) Add 295.96g methanol in the 500ml four-neck flask equipped with thermometer, electric stirrer, condenser tube and constant pressure funnel, then add 80g tetramethoxysilane and 4g zirconium nitrate, stir, after stirring, Raise the temperature to 40°C to obtain liquid A;
[0050] (2) Under the condition of stirring, slowly drop 20g of water and 0.04g of hydrochloric acid mixed uniformly into liquid A within 0.5h, react for 1h, then cool to room temperature, stop stirring, and age at room temperature for 1 day , to obtain a zirconium-doped silica polymer sol, the solid content of which was 14% after baking at 150° C. for 2 hours.
[0051] Wherein, the quality of tetramethoxysilane, zirconium nitrate, methanol, water and hydrochloric acid accounts for 20% of tetramethoxysilane, 1% of zirconium nitrate, 73.99% of methanol, and 5% of water in the whole system. %, hydrochloric acid accounted for 0.01%.
[00...
Embodiment 2
[0077] (1) Preparation of zirconium-doped silica polymer sol
[0078] (1) Add 159.2g of isopropanol to a 500ml four-necked flask equipped with a thermometer, electric stirrer, condenser and constant pressure funnel, then add 100g of tetramethoxysilane, 60g of tetraethoxysilane and 20g of acetic acid zirconium, stirred, and after stirring evenly, the temperature was raised to 50°C to obtain liquid A;
[0079] (2) Under stirring conditions, slowly drop 60g of water and 0.8g of nitric acid into liquid A within 1 hour, react for 2 hours, then cool to room temperature, stop stirring, and age at room temperature for 2 days, The obtained zirconium-doped silica polymer sol was baked at 150°C for 2 hours, and the solid content was 18%.
[0080] Wherein, the mass proportions of the alkoxysilane, zirconium acetate, isopropanol, water and nitric acid in the whole system are respectively 40% for alkoxysilane, 5% for zirconium acetate, 39.8% for isopropanol, 39.8% for water, and 5% for zir...
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