Red schorl type titanium dioxide coating method and preparation of used reagent
A titanium dioxide, rutile type technology, applied in the direction of dyeing low molecular organic compounds, fibrous fillers, etc., can solve the problems of yellowing, powder coating film, reduce product performance and service life, etc., to improve whiteness, improve weather resistance and other problems properties, improve gloss
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Embodiment 1
[0029] The rutile type titanium dioxide coating method of the present invention, it adopts following steps to carry out successively:
[0030](1) Add rutile titanium dioxide powder to the aqueous solution containing dispersant ethylene glycol grafted modified simethicone oil, which contains 400 g / L of titanium dioxide powder and 1 ml / L of dispersant in the aqueous solution; adjust the pH value at 11 , stirring and sand milling until the particle size of titanium dioxide is 0.20 μm;
[0031] (2) Stirring step (1) Sand mill the obtained slurry, add water to dilute the content of titanium dioxide in the slurry to 300g / L, and maintain the temperature of the slurry at 40°C; then add zirconium salt to the slurry, adding 1g Zr(SO 4 ) 2 At this time, the pH of the slurry is 1.5; then stir and mature at 40°C for 60 minutes;
[0032] (3) Add sodium aluminate to the slurry obtained in step (2), add 1 g of aluminate per liter of slurry, and then the pH of the slurry is 3.5; then stir a...
Embodiment 2
[0040] The rutile type titanium dioxide coating method of the present invention, it adopts following steps to carry out successively:
[0041] (1) Add the rutile titanium dioxide powder to the aqueous solution containing the dispersant ethylene glycol grafted modified simethicone oil, which contains 800 g / L of titanium dioxide powder and 10 ml / L of the dispersant in the aqueous solution; adjust the pH value at 12 , stirring and sand milling until the titanium dioxide particle size is 0.20-0.30 μm; the particle size of the rutile titanium dioxide powder is 45 μm standard sieve residue≤0.5%, and the titanium dioxide content is≥98% (weight).
[0042] (2) Stirring step (1) Sand mill the obtained slurry, add water to dilute the content of titanium dioxide in the slurry to 400g / L, and maintain the temperature of the slurry at 45°C; then add zirconium salt to the slurry, adding 15g ZrCl 4 At this time, the pH of the slurry is 2.5; then stir and mature at 45°C for 70 minutes;
[004...
Embodiment 3
[0050] The rutile type titanium dioxide coating method of the present invention, it adopts following steps to carry out successively:
[0051] (1) Add rutile titanium dioxide powder to the aqueous solution containing dispersant ethylene glycol grafted modified simethicone oil, which contains 600g / L of titanium dioxide powder and 5ml / L of dispersant in the aqueous solution; adjust the pH value at 12 , stirring and sand milling until the titanium dioxide particle size is 0.30 μm; the particle size of the rutile titanium dioxide powder is 45 μm standard sieve residue ≤ 0.5%, titanium dioxide content ≥ 98% (weight).
[0052] (2) Stirring step (1) Sand mill the obtained slurry, add water to dilute the content of titanium dioxide in the slurry to 350g / L, and maintain the temperature of the slurry at 40°C; then add zirconium salt to the slurry, adding 8g ZrOCl 2 At this time, the pH of the slurry is 2.5; then stir and mature at 40°C for 70 minutes;
[0053] (3) Add sodium aluminate...
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