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Self-cleaning coating agent for construction exterior wall paint, preparation and use method

A self-cleaning technology for building exterior walls, applied to polyester coatings, devices for coating liquid on surfaces, coatings, etc., can solve problems such as complex high-temperature calcination processes, achieve stable and long-lasting dispersion effects, save costs, and increase costs Effect of Membrane Properties

Inactive Publication Date: 2008-12-24
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods still have some limitations. For example, the addition of titanium oxide dispersion will have a certain impact on the properties of the coating itself, and the high-temperature calcination process is more complicated, and it needs to be carried out on the surface of the high-temperature-resistant substrate.

Method used

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  • Self-cleaning coating agent for construction exterior wall paint, preparation and use method
  • Self-cleaning coating agent for construction exterior wall paint, preparation and use method
  • Self-cleaning coating agent for construction exterior wall paint, preparation and use method

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Firstly, a nano-titanium oxide composite sol with a solid content of 2% was prepared, in which the titanium oxide was in anatase crystal form and the particle diameter was less than 10 nm. 0.5% of sodium dodecylbenzenesulfonate and polyethylene glycol- The mixture of 600, wherein the mass ratio of sodium dodecyl benzene sulfonate and polyethylene glycol-600 is 3:1, is dispersed in the sodium hydroxide aqueous solution of pH=10 after vigorous stirring to form a transparent and stable dispersion. The dispersion liquid is added to the acrylic emulsion with a mass percentage of 0.3%, and the mixture is stirred evenly at normal temperature to obtain a self-cleaning functional film coating agent. The above-mentioned film coating agent is sprayed on the surface of the building exterior wall paint for secondary coating, and is naturally dried at normal temperature to form a multifunctional coating with anti-fouling, anti-ultraviolet radiation and air purification properties. Ta...

Embodiment 2

[0032] Firstly, a nano-titanium oxide composite sol with a solid content of 2% was prepared, in which the titanium oxide was anatase crystal form and the particle diameter was less than 10 nm. A mixture of 10% aliphatic alcohol polyoxyethylene ether sodium sulfate and diethanolamine was added to the sol. The ratio of fatty alcohol polyoxyethylene ether sodium sulfate and diethanolamine is 1:1, and after vigorous stirring, it is dispersed in an aqueous sodium hydroxide solution with pH=10 to form a transparent and stable dispersion. The dispersion liquid is added with 5% by mass of silicone-acrylic emulsion, and the mixture is uniformly stirred at room temperature to obtain a self-cleaning functional coating agent. The above-mentioned film coating agent is sprayed on the surface of the building exterior wall paint for secondary coating, and is naturally dried at normal temperature to form a multifunctional coating with anti-fouling, anti-ultraviolet radiation and air purificatio...

Embodiment 3

[0034]Firstly, a nano-titanium oxide composite sol with a solid content of 2% was prepared, in which the titanium oxide was in anatase crystal form and the particle diameter was less than 10 nm, and a mixture of 3% sodium dodecyl sulfonate and diethanolamine was added to the sol, wherein The ratio of fatty alcohol polyoxyethylene ether sodium sulfate and diethanolamine is 2:1, and after vigorous stirring, it is dispersed in an aqueous sodium hydroxide solution with pH=10 to form a transparent and stable dispersion. The dispersion liquid is added to the pure acrylic emulsion with a mass percentage of 2%, and the mixture is stirred evenly at room temperature to obtain a self-cleaning functional coating agent. The above-mentioned film coating agent is sprayed on the surface of the building exterior wall paint for secondary coating, and is naturally dried at normal temperature to form a multifunctional coating with anti-fouling, anti-ultraviolet radiation and air purification prope...

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Abstract

The invention provides a self-cleaning film agent for exterior wall paint, a preparation method and an application method thereof. The preparation method for the self-cleaning film agent is mainly characterized in that: the preparation method comprises the following steps of: taking nanometer titanium oxide composite collosol as a reference; dispersing the collosol in an alkaline aqueous solution after adding an anionic surfactant or a non-ionic surfactant with a mass percent of between 0.1 and 10 to form a transparent and stable dispersion system; and finally adding a certain number of film forming substances into the system to obtain the self-cleaning film agent for the exterior wall paint. The self-cleaning film agent is applied to the surface of the exterior wall paint for secondary coating through a spray coating method or a roller coating method or a brush coating method, and a film is formed at a normal temperature, thereby forming a multifunctional coating with stain and ultraviolet irradiation resistance and air cleaning performance on the external surface of the paint. As the method has the obvious advantages of good performance, simple process, convenient construction, durable effect, environmental friendliness, etc., the method can be applied to various exterior wall paints in a large scale.

Description

technical field [0001] The invention relates to a self-cleaning film coating agent for building exterior wall coatings, a preparation method and a use method, and belongs to the related field of environmental protection and energy saving building materials. Background technique [0002] Building exterior wall materials can be divided into three main categories: paint, brick or glass curtain wall. Due to the serious air pollution in the city, the harmful gases or dust in the environment can easily cause erosion and contamination of the exterior wall paint. After the paint is polluted, the exterior surface of the building will be mottled, which will seriously affect its external image. Generally, it can only be cleaned or cleaned. Repainting after eradication will greatly increase the use cost of the building. Some buildings use face bricks or glass curtain walls as exterior wall materials, which cannot avoid the problem of surface pollution. They can only be cleaned regularl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/00C09D125/14C09D183/07C09D131/04C09D167/00C09D5/00B05D5/08B05D7/24
Inventor 高濂谢晓峰
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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