Test method for light resistance of titanium dioxide
A test method, titanium dioxide technology, applied in the preparation of test samples, weather resistance/light resistance/corrosion resistance, measuring devices, etc., can solve problems such as not suitable for long-term use, easy cracking of the test film, and affecting test accuracy. Achieve the effect of optimizing the preparation process and color difference test parameters, short test cycle, and not easy to precipitate
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[0022] Example 1:
[0023] Take 5.00g of triethanolamine, 2.50g of ethanol, 57.5g of deionized water, stir and mix evenly, add 35g of melamine formaldehyde resin powder after mixing, heat to 50℃ to dissolve completely, and then cool to normal temperature; the above solution is the newly prepared melamine Formaldehyde resin aqueous solution, weigh 1.20g titanium dioxide (test sample) and DuPont titanium dioxide R796 (standard sample), add to 6.0mL melamine formaldehyde resin aqueous solution, ultrasonically disperse for 5min to make the titanium dioxide uniformly dispersed in the resin, Take 2.5 mL of the evenly dispersed mixed solution and evenly coat it on the glass slide, and place it in a drying oven at 70°C for continuous drying for 10 hours. Take it out, put it into the exposure machine for 20min, 40min, 60min, 80min, 120min, and test the color difference ΔE of the test sample and the standard sample before and after exposure.
[0024] After testing and calculation, the color...
Example Embodiment
[0025] Example 2:
[0026] Take 3.00g of triethanolamine, 4.50g of ethanol, 57.5g of deionized water, stir and mix evenly, add 35g of melamine formaldehyde resin powder after mixing, heat to 50℃ to dissolve completely, then cool to normal temperature; the above solution is the newly prepared melamine Formaldehyde resin aqueous solution, weigh 1.20g titanium dioxide (test sample) and DuPont titanium dioxide R796 (standard sample), add to 6.0mL melamine formaldehyde resin aqueous solution, ultrasonically disperse for 5min to make the titanium dioxide uniformly dispersed in the resin, Take 2.5 mL of the evenly dispersed mixed solution and evenly coat it on the glass slide, place it in a drying oven at 80°C, and continue drying for 8 hours. Take it out and put it in the exposure machine for 40 minutes to test the color difference ΔE between the test sample and the standard sample after exposure. After testing and calculation, it can be obtained that the color difference ΔE of the te...
Example Embodiment
[0027] Example 3:
[0028] Take 7.00g of triethanolamine, 2.50g of ethanol, 55.5g of deionized water, stir and mix evenly, add 35g of melamine formaldehyde resin powder after mixing, heat to 50℃ to dissolve completely, then cool to normal temperature; the above solution is the newly prepared melamine Formaldehyde resin aqueous solution, weigh 1.20g titanium dioxide (test sample) and DuPont titanium dioxide R796 (standard sample), add to 6.0mL melamine formaldehyde resin aqueous solution, ultrasonically disperse for 5min to make the titanium dioxide uniformly dispersed in the resin, Take 2.5 mL of the evenly dispersed mixed solution and evenly coat it on the glass slide, and place it in a drying oven at 60°C for continuous drying for 10 hours. Take it out and put it in the exposure machine for 60 minutes to test the color difference ΔE of the test sample and the standard sample after exposure. After testing and calculation, it can be obtained that after 60 minutes of exposure, th...
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