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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

Inactive Publication Date: 2016-07-06
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above detection method shortens the detection cycle, after the titanium dioxide is mixed with the resin, it is easy to produce precipitation and the storage time is short, so it is not suitable for long-term use.
Moreover, the prepared test film is easy to crack, and the yield rate of the finished product is low, which affects the test accuracy

Method used

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  • Test method for light resistance of titanium dioxide
  • Test method for light resistance of titanium dioxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Take 5.00g of triethanolamine, 2.50g of ethanol, and 57.5g of deionized water, stir and mix evenly, add 35g of melamine formaldehyde resin powder after mixing evenly, heat to 50°C until it dissolves completely, and then cool down to room temperature; the above solution is the newly prepared melamine Formaldehyde resin aqueous solution, take by weighing 1.20g titanium dioxide (test sample) and titanium dioxide R796 (standard sample) produced by DuPont Company respectively, join in 6.0mL melamine formaldehyde resin aqueous solution, ultrasonic dispersion 5min makes titanium dioxide evenly disperse in resin, Take 2.5 mL of the uniformly dispersed mixed solution and evenly coat it on a glass slide, place it in a drying oven at 70°C, and dry it continuously for 10 h. Take it out, put it into the exposure machine for 20min, 40min, 60min, 80min, and 120min respectively, and measure the color difference ΔE between the test sample and the standard sample before and after exposure...

Embodiment 2

[0026] Take 3.00g of triethanolamine, 4.50g of ethanol, and 57.5g of deionized water, stir and mix evenly, add 35g of melamine formaldehyde resin powder after mixing evenly, heat to 50°C until it dissolves completely, and then cool down to room temperature; the above solution is the newly prepared melamine Formaldehyde resin aqueous solution, take by weighing 1.20g titanium dioxide (test sample) and titanium dioxide R796 (standard sample) produced by DuPont Company respectively, join in 6.0mL melamine formaldehyde resin aqueous solution, ultrasonic dispersion 5min makes titanium dioxide evenly disperse in resin, Take 2.5 mL of the uniformly dispersed mixture and evenly coat it on a glass slide, place it in a drying oven at 80°C, and dry it continuously for 8 hours. Take it out, put it into the exposure machine for 40 minutes, and 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 ...

Embodiment 3

[0028] Take 7.00g of triethanolamine, 2.50g of ethanol, and 55.5g of deionized water, stir and mix evenly, add 35g of melamine formaldehyde resin powder after mixing evenly, heat to 50°C until it dissolves completely, and then cool down to room temperature; the above solution is the newly prepared melamine Formaldehyde resin aqueous solution, take by weighing 1.20g titanium dioxide (test sample) and titanium dioxide R796 (standard sample) produced by DuPont Company respectively, join in 6.0mL melamine formaldehyde resin aqueous solution, ultrasonic dispersion 5min makes titanium dioxide evenly disperse in resin, Take 2.5 mL of the uniformly dispersed mixture and evenly coat it on a glass slide, place it in a drying oven at 60°C, and dry it continuously for 10 h. Take it out, put it into the exposure machine for 60 minutes, and measure the color difference ΔE between the test sample and the standard sample after exposure. After testing and calculation, it can be obtained that a...

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Abstract

The invention relates to a test method for light resistance of titanium dioxide. The test method includes the following steps that 1, a melamino-formaldehyde resin water solution is prepared and contains triethanolamine, ethyl alcohol and melamino-formaldehyde resin, and the mass fraction of the melamino-formaldehyde resin is 20-50%; 2, titanium dioxide is dispersed in the melamino-formaldehyde resin water solution, and the concentration of titanium dioxide is 0.1-0.5 g / mL; 3, a glass slide is coated with the mixture and then placed in a drying oven and dried to obtain a film; 4, the dried film is taken out and put into a printing-down machine with an iodine gallium light to be exposed under the blazing sun for a long time, and chromatic aberration delta E value before and after the step of exposure under the blazing sun for a long time is tested. The test method is short in test period, the operation process is simple, storage time is long, precipitation does not occur easily, and test results are high in accuracy.

Description

technical field [0001] The invention relates to the field of performance detection methods of titanium dioxide, in particular to a method for testing the light resistance of titanium dioxide. Background technique [0002] Titanium dioxide is the most used white pigment, because it has the highest refractive index (rutile type 2.71, anatase type 2.55) among the known white pigments, so it has unparalleled hiding power and excellent optical properties, becoming a white pigment s King. However, titanium dioxide has photocatalytic activity, and a photocatalytic reaction occurs under sunlight, especially under the irradiation of ultraviolet light, so that the organic matrix around titanium dioxide is oxidatively decomposed, and the paint coating or plastic used with titanium dioxide becomes yellow, cracks, and powders. changes, affecting the use of the product. Therefore, light resistance is an important pigment performance of titanium dioxide. However, at present, the light r...

Claims

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Application Information

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IPC IPC(8): G01N17/00G01N1/28
CPCG01N1/28G01N1/2813G01N17/004
Inventor 乔玄玄储成义孙爱华晏育刚华原杰吴明宇许高杰郭建军
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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