A kind of preparation method of environment-friendly long-acting mildew-proof coating

Abstract

A preparation method of an environment-friendly long-acting anti-mold coating, water-based epoxy curing agent, wetting agent, dispersant, defoamer, anti-mold and anti-bacterial agent slurry, titanium dioxide, wollastonite powder, calcined kaolin, talc powder, Diatomaceous earth constitutes the upper abrasive group of component A, hollow glass microspheres, deionized water, thickener, and leveling agent constitute the lower abrasive group of component A, and epoxy resin constitutes component B. Agent slurry, antifungal and antibacterial agent slurry contains deionized water, zinc oxide, antifungal agent, zirconium phosphate silver-loaded antibacterial agent and negative ion antibacterial additive, and then prepares component A. Environmentally friendly long-acting anti-mildew coating can be prepared by mixing, dispersing and stirring at a ratio of 7.6-9.8:1 by weight. After curing, the environmentally-friendly long-acting anti-mold coating is cross-linked by chemical bonds to form a film. The coating is dense and has strong adhesion. There is also a certain degree of air permeability, so the construction performance is excellent, not only suitable for new walls, but also suitable for painting old walls with mold.

Description

Technical field [0001] The present invention is a method of preparing for coating technology, especially an environmentally friendly long -acting long -term anti -mold coating. Background technique [0002] The occurrence of mold not only decreases the decorative surface of the eroded coating, but also causes the paint film to crack or peel off.The gloomy and humid fields with poor ventilation, especially materials or production environment rich in microbial nutrition, such as beer, soy products, dairy products, cigarettes, leather, cosmetics, plastic products and other industries.Breeding and growth, if ordinary decorative coatings are used, it will be eroded to varying degrees of mold. The coating after the corrosion of the mold will gradually fade and stain to fall off.This is because the mold will secrete enzymes after the mold erosion coating film. These secretions will further decompose organic membrane substances in the coating, becoming a nutrients for mold growth, thereb...

AI Technical Summary

Problems solved by technology

[0004] Most of the existing environment-friendly anti-mold paints on the market are made of ordinary latex paint compounded with one or several anti-mold and antibacterial agents, which have low adhesion, poor stain resistance, and easy staining. They are widely used in food and pharmaceutical workshops. It is easy to soften and fall off in a hot and humid environment, and the anti-mildew and anti-bacterial long-term effect of the coating is not good

[0005] Solvent-based anti-mold coatings have good anti-mold and bactericidal effects, long service life, and high comprehensive performance, but because they contain various volatile organic solvents such as alcohols, ketones, and esters, they not only pollute the atmosphere, but also affect human health. cause harm

[0006] Although the solvent-free antifungal coating has low VOC content, is environmentally friendly and has excellent performance, its coating film is dense and has poor air permeability, and it is easy to cause bubbling and peeling off under the impact of water vapor pressure on the concrete base

[0007] Chinese patent 201110413043.9 discloses a water-based pure acrylic anti-mildew and moisture-proof paint. The elongation at break of the paint film at room temperature is greater than 200%, which is environmentally friendly and non-toxic. The selected BLJ-938 acrylic emulsion has a very low glass transition temperature (-5°C). , the paint film has low adhesion, poor heat and humidity resistance and stain resistance, and is easy to fall off and stain in a high temperature and high humidity environment, so it is not suitable for use as an anti-mildew coating

[0009] Chinese patent 201210526744.8 discloses a solvent-based acrylic anti-mildew paint. The paint is made of acrylic resin. The acrylic resin has the disadvantages of being brittle at low temperature and sticky at high temperature. The coating is easy to crack in winter and easy to stain in summer , anti-mildew and decorative effects are greatly reduced

In addition, the paint uses dibutyl phthalate and toluene as plasticizers or diluents, which are toxic to the environment and the human body. Pollution-free demand

[0010] Organic anti-mold fungicides have high anti-mold and sterilization efficiency, but have the disadvantages of long-term effect, heat resistance and poor safety

Inorganic anti-mildew and fungicides are just the opposite. They have long-term anti-mold and anti-fungal properties and good heat resistance, but their sterilization efficiency is slightly lower.