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A kind of water-based interior wall paint and preparation method thereof

A water-based technology for interior wall coatings, applied in the direction of antifouling/underwater coatings, polyurea/polyurethane coatings, coatings, etc., can solve the problem of limited purification performance and actual effect of functional interior wall coatings, poor photocatalytic purification function, Coating cracking and other problems, to achieve the effect of improving visible light response ability, high catalytic degradation ability, and reducing base corrosion

Active Publication Date: 2020-11-13
西安前沿材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, considering that the film-forming substances are organic matter, the film-forming substances in the coating will also be decomposed while purifying the air, and the base corrosion will cause cracking, peeling and discoloration of the coating.
In addition, when titanium dioxide powder is directly added to the coating, due to the embedding effect of the film-forming substance, the photofunctional composition exposed on the surface is very small, which has the disadvantage of poor photocatalytic purification function.
In addition, nano-titanium dioxide needs to be irradiated by ultraviolet rays of sunlight to produce photocatalysis, and indoor ultraviolet light is very limited. Therefore, the purification performance and practical effect of existing functional interior wall coatings are very limited.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A water-based interior wall paint, its raw material components and weight percentages are: optical functional filler 8%; water-based polyurethane emulsion 45%; silica sol 13%; chitosan 3%; film-forming aid 1.2%; dispersant 1.1% ; Deionized water 25%; Defoamer 0.6%; Leveling agent 1.0%; Hydroxymethylcellulose 0.1%.

[0025] The photofunctional filler is anatase titanium dioxide modified by a silane coupling agent and metallic silver nanoparticles, and its preparation steps are:

[0026] 1) Disperse the anatase-type titanium dioxide in deionized water under the condition of mechanical stirring, heat, and when the temperature reaches 60°C, add a silver nitrate solution with a concentration of 1.5mol / L, and the molar ratio of silver to titanium dioxide is 0.6%; continue to add Citric acid solution with a concentration of 0.2mol / L, the volume ratio of citric acid solution and silver nitrate solution is 1:1, heated to reflux for 1 hour, centrifuged, and dried at 4°C for 4 hou...

Embodiment 2

[0039] A water-based interior wall paint, its raw material components and weight percentages are: optical functional filler 12%; water-based polyurethane emulsion 20%; silica sol 16%; chitosan 5%; film-forming aid 0.6%; dispersant 1.4% ; Deionized water 35%; defoamer 0.2%; leveling agent 1.5%; hydroxymethyl cellulose 0.2%.

[0040] The photofunctional filler is anatase titanium dioxide modified by a silane coupling agent and metallic silver nanoparticles, and its preparation steps are:

[0041]1) Disperse anatase-type titanium dioxide in deionized water under mechanical stirring conditions, heat, and add a silver nitrate solution with a concentration of 0.8mol / L when the temperature reaches 80°C, and the molar ratio of silver to titanium dioxide is 0.1%; continue to add Citric acid solution with a concentration of 0.7mol / L, the volume ratio of citric acid solution and silver nitrate solution is 1:1, heat and reflux for 0.8 hours, after centrifugation, dry at 80°C for 3 hours t...

Embodiment 3

[0054] A water-based interior wall paint, its raw material components and weight percentages are: optical functional filler 15.5%; water-based polyurethane emulsion 35%; silica sol 10%; chitosan 8%; film-forming aid 0.9%; dispersant 0.8% ; Deionized water 50%; Defoamer 0.4%; Leveling agent 0.6%; Hydroxymethylcellulose 0.4%.

[0055] The photofunctional filler is anatase titanium dioxide modified by a silane coupling agent and metallic silver nanoparticles, and its preparation steps are:

[0056] 1) Disperse anatase-type titanium dioxide in deionized water under mechanical stirring conditions, heat, and add a silver nitrate solution with a concentration of 0.1mol / L when the temperature reaches 100°C, and the molar ratio of silver to titanium dioxide is 1%; continue to add Citric acid solution with a concentration of 1.2mol / L, the volume ratio of citric acid solution and silver nitrate solution is 1:1, heated to reflux for 0.5 hours, centrifuged, and dried at 120°C for 2 hours t...

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Abstract

The invention discloses a waterborne interior wall coating and a preparation method thereof. The waterborne interior wall coating is prepared from the following raw materials including a light functional filler, a waterborne polyurethane emulsion, silica sol, chitosan, a film-forming additive, a dispersant, deionized water, a defoamer, a flow agent and hydroxymethyl cellulose. The preparation method of the waterborne interior wall coating comprises the following steps of firstly, sequentially adding the hydroxymethyl cellulose, the chitosan and the film-forming additive in the deionized wateraccording to the weight part of the formula, and performing stirring to obtain a mixed liquid; secondly, sequentially adding the waterborne polyurethane emulsion and the silica sol in the formula in the obtained mixed liquid, and performing stirring to obtain a waterborne polyurethane coating; and finally, sequentially adding the defoamer, the flow agent, the light functional filler and the dispersant in the obtained waterborne polyurethane coating, and performing stirring to obtain the waterborne interior wall coating with a self-purification function. The waterborne interior wall coating caneffectively solves the problems of base corrosion and light functional component embedding, can decompose harmful gas in air under the indoor environment and has the characteristics of environmentalprotection and good self-purification effect.

Description

technical field [0001] The invention relates to the field of water-based interior wall paint, in particular to a water-based interior wall paint and a preparation method thereof. Background technique [0002] Environmental pollution problems represented by environmental hormones and indoor pollution syndrome are expanding globally and seriously threatening human health, survival and development. Protecting the environment and preventing indoor air pollution has become a major concern of people all over the world today. social problem. New house decoration syndrome has also caused serious harm to human health in varying degrees. Formaldehyde, benzene, ammonia and other toxic and harmful gases caused by interior decoration are the biggest invisible killers, and the harm they cause to human beings is shocking. Indoor decoration pollution mainly includes formaldehyde, benzene, toluene, xylene, TVOC, ammonia, radon, etc. emitted by various building materials. Formaldehyde - is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/04C09D5/16C09D7/61C09D7/63C09D7/62C09D7/65
CPCC08K2003/2241C08K2201/011C08L2205/035C09D5/14C09D5/1662C09D5/1687C09D175/04C08L5/08C08K13/06C08K3/36C08K9/02C08K9/06C08K3/22
Inventor 许并社孙东峰余愿杜高辉马淑芳苏庆梅
Owner 西安前沿材料科技有限公司
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