Anti-bacterial water-based paint and preparation method thereof

Abstract

The invention relates to anti-bacterial water-based paint and a preparation method thereof. The paint comprises the following components in parts by weight: 0.2-11 parts of anti-bacterial agent, 8-33 parts of nano material, 23-64 parts of water-based resin dispersoid and 0.75-18 parts of adhesive resin or plasticizer. The preparation method comprises the following steps: firstly preparing a nano silver anti-bacterial agent; mixing deionized water, the anti-bacterial agent, a wetting agent, a dispersing agent and a defoaming agent and uniformly mixing, adding the nano material, uniformly dispersing to obtain the water-based dispersoid; adding the obtained water-based dispersoid to the mixed emulsion or water-based resin dispersoid, then adding the adhesive resin or plasticizer and various conventional assistants, stirring and dispersing evenly; adding pigments or colorant; and supplementing water to obtain the anti-bacterial water-based paint. The long-acting broad-spectrum antibacterial water-based paint has high fungicidal efficiency (more than 99%) on escherichia coli, staphylococcus aureus, black varietas of bacillus subtilis and the like and can reduce the high concentrate of organic matters of formaldehyde to the range of specified concentration index.

Description

technical field [0001] The invention belongs to the technical field of water-based paint, in particular to an antibacterial water-based paint. The invention also relates to a preparation method of the antibacterial water-based paint. Background technique [0002] With the improvement of global environmental protection awareness, people's demand for functional environmental protection coatings is becoming more and more urgent. The use of traditional solvent paints will cause harm to human health and the environment. Especially when used indoors, toxic organic solvents such as benzene continue to volatilize for a long time, directly endangering human health and life safety. For example, volatile organic compounds can cause headaches, nausea, sore throat, asthma and other symptoms. Free isocyanate is an inhaled, accumulative, highly toxic compound that can cause bronchitis, asthma, and even suffocation. Benzene is a highly toxic carcinogen, which mainly affects the hematopoi...

AI Technical Summary

Problems solved by technology

However, due to the toxicity or high cost of some metal ions with antibacterial ability, the currently widely used antibacterial ions are limited to silver and zinc. Among them, silver ions have the strongest antibacterial ability. From the perspective of antibacterial ability alone, it is an inorganic antibacterial agent. The best choice, and the toxicity of silver is far less than that of zinc, so it is the best choice for inorganic antibacterial agents

There are also some problems with inorganic antibacterial agents: the first is the problem of antibacterial stability

Because most of the inorganic antibacterial agents contain silver ions, they are easily transformed into brown silver oxide or reduced to black elemental silver by ultraviolet catalysis. The discoloration not only reduces their antibacterial properties, but also limits their application to white or light-colored paints.

Secondly, the high cost of using silver in large quantities restricts its application in a wider range

The above two technical problems have seriously restricted the promotion and use of inorganic antibacterial agents, becoming the biggest problem in this industry

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