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Formaldehyde-removing indoor decorative coating based on visible light catalysis

An interior decoration and visible light technology, applied in the field of decorative coatings, can solve the problems of unsatisfactory formaldehyde purification effect, impact resistance, general moisture resistance, and insufficient moisture resistance, etc., to improve activity and chemical stability Good impact resistance, good impact resistance effect

Active Publication Date: 2021-04-13
深圳市德固新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, TiO 2 It mainly absorbs ultraviolet light with a wavelength less than 384nm, and it is difficult to use visible light. Generally, it is necessary to treat TiO 2 Modified to make it use visible light, in order to improve the photocatalytic effect, but the modified TiO in the prior art 2 There are still problems such as insufficient utilization of visible light, poor effect on formaldehyde degradation, impact resistance, heat and humidity resistance and other performances are not good enough.
As in Patent Document 1 (CN110003693A), although TiO 2 Modification has been carried out, but the purification effect of formaldehyde is still unsatisfactory, and the impact resistance and heat and humidity resistance are also average.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1, a kind of formaldehyde-removing interior decoration coating based on visible light catalysis, is characterized in that, this coating comprises the raw material of following percentage by weight, and wherein, coating matrix 27%, solvent 30%, auxiliary agent 3%, pigment and filler 20%, Photocatalyst 20%, the sum of the mass percentages of the above raw materials is 100%.

[0030] The paint matrix is ​​emulsion, and the emulsion is polyvinyl acetate emulsion.

[0031] The solvent is water.

[0032] The auxiliary agent is a hardening agent.

[0033] The pigments and fillers are red iron oxide, talcum powder and silicon dioxide.

[0034] The photocatalyst is modified nano-TiO 2 Powder, modified nano TiO 2 The powder is nano-TiO doped with chromium and molybdenum 2 Powder, modified nano TiO 2 The preparation method of the powder is as follows: the nano-TiO 2 Granules, chromium nitrate, molybdenum nitrate, sodium hydroxide and water are mixed to obtain a m...

Embodiment 2

[0037]Embodiment 2, a formaldehyde-removing interior decoration coating based on visible light catalysis, is characterized in that, the coating comprises the following raw materials in weight percentage, wherein, coating matrix 35%, solvent 24.5%, auxiliary agent 0.5%, pigment and filler 30%, Photocatalyst 10%, the sum of the mass percentages of the above raw materials is 100%.

[0038] The paint matrix is ​​an emulsion, and the emulsion is a vinyl acetate-acrylate copolymer emulsion.

[0039] The solvent is water.

[0040] The auxiliary agent is a dispersant.

[0041] The pigments and fillers are red iron oxide, talcum powder and silicon dioxide.

[0042] The photocatalyst is modified nano-TiO 2 Powder, modified nano TiO 2 The powder is nano-TiO doped with chromium and molybdenum 2 Powder, modified nano TiO 2 The preparation method of the powder is as follows: the nano-TiO 2 Granules, chromium nitrate, molybdenum nitrate, sodium hydroxide and water are mixed to obtain ...

Embodiment 3

[0045] Embodiment 3, a kind of formaldehyde-removing interior decoration coating based on visible light catalysis, is characterized in that, this coating comprises the raw material of following percentage by weight, wherein, coating matrix 27%, solvent 30%, auxiliary agent 3%, pigment and filler 25%, Photocatalyst 15%, the sum of the mass percentages of the above raw materials is 100%.

[0046] The paint matrix is ​​emulsion, and the emulsion is polyvinyl acetate emulsion.

[0047] The solvent is water.

[0048] The auxiliary agent is a hardening agent.

[0049] The pigments and fillers are red iron oxide, talcum powder and silicon dioxide.

[0050] The photocatalyst is modified nano-TiO 2 Powder, modified nano TiO 2 The powder is nano-TiO doped with chromium and molybdenum 2 Powder, modified nano TiO 2 The preparation method of the powder is as follows: the nano-TiO 2 Granules, chromium nitrate, molybdenum nitrate, sodium hydroxide and water are mixed to obtain a mixed...

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Abstract

The invention relates to a formaldehyde-removing interior decorative coating based on visible light catalysis. The coating comprises the following raw materials in percentage by weight: 20-35% of a coating matrix, 15-30% of a solvent, 0.5-3% of an auxiliary agent, 20-30% of a pigment filler and 10-20% of a photocatalyst, and the sum of the mass percentages of the raw materials is 100%. Wherein the photocatalyst is modified nano TiO2 powder, and the proper mass ratio of nano TiO2 particles to the sum of chromic nitrate and molybdenum nitrate can improve the photocatalytic performance of the coating, so that the degradation of formaldehyde is facilitated. The reasonable reaction temperature and time can ensure that the formed modified nano TiO2 powder is mainly spherical, the agglomeration phenomenon is avoided, the particle size distribution is uniform, the photocatalytic performance of the coating is better, and the formaldehyde purification efficiency is better. And the pigment filler is iron oxide red, talcum powder and silicon dioxide, and the iron oxide red, the talcum powder and the silicon dioxide can improve the activity and the chemical stability of the photocatalyst. The coating provided by the invention has a good degradation effect on formaldehyde, and has excellent comprehensive properties such as impact resistance, humidity resistance and the like.

Description

technical field [0001] The invention relates to a decorative coating, in particular to a formaldehyde-removing interior decorative coating based on visible light catalysis. Background technique [0002] Indoor decoration materials and furniture are increasingly becoming the main pollution source of the indoor environment, and formaldehyde (HCHO) is the most common substance in the pollution source. Formaldehyde is colorless and volatile. Long-term exposure to formaldehyde can lead to various chronic diseases. Formaldehyde is also listed as a carcinogen substance. Fluorescent lamps are often used indoors, which belong to visible light. It is of great significance to remove formaldehyde in an environment of visible light to improve air quality. [0003] At present, the use of photocatalysts to purify the air is a very promising method to improve the environment, TiO 2 、WO 3 etc. are common photocatalysts. Nano-TiO 2 It is non-toxic, stable in chemical properties, and has ...

Claims

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Application Information

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IPC IPC(8): C09D131/04C09D5/32C09D7/62C09D7/61
CPCC09D131/04C09D5/32C09D7/62C09D7/61C08K2201/011C08K2003/2241C08K2003/2272C08L2201/08C08K3/22C08K3/34C08K3/36C08K9/02C08K13/06
Inventor 张晓峰
Owner 深圳市德固新材料科技有限公司
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