What is the role of anti-mold agents for water-based coatings

2021-12-07   Pageview:83

Paint anti-mildew agent is a highly effective, low-toxicity fungicide for emulsion paints, polymer emulsions, pigment pastes and all types of water-based coatings. It can also be used to inhibit the growth of bacteria and fungi in the production and storage of printing inks and other organic products containing water. Coating anti-mold agents have been widely used in mass storage emulsions on the sterilization of corrosion.

The U.S. Environmental Protection Agency (EPA) has approved the registration of paint mold inhibitors for water-based paints and coatings in-can biocides. A large number of experiments and practical applications have proved that the coating anti-mildew agent to acrylic acid, polyvinyl acetate, polystyrene butyl and other copolymers have excellent bactericidal corrosion protection, and with these products in organic and inorganic components have excellent compatibility.

 

 

 

 

 

 

 

 

 

 

 

 

 

The choice of matting powder in matt coatings not only pays attention to porosity, oil absorption, particle size and pH characteristics, but also chooses matting powders with organic (wax) treatment on the surface according to the requirements of matt paint feel and scratch resistance. As general matting powder itself is porous particles, the surface is rough, whether it is anti-scratch, metal scratch, abrasion resistance wax or hand feeling, it is not ideal.

Therefore, if you want to further improve these properties, you need to match various wax powders or Wax paste to improve the matte coating film using matting powder alone. Of course, if higher quality and performance of the matt paint are required, for example, the matting powder is required to be evenly arranged, the matte coating film is smooth, and provides excellent hand feeling and scratch resistance, then it is necessary to further choose modified silicone Alkane to improve these properties. In order to achieve the required high performance, additives with excellent wetting, leveling and alignment properties are usually selected, and two modified polysiloxanes with high scratch resistance and special hand-feel properties are used in combination. These are based on the improvement of coating performance and quality requirements, which need to be achieved through coating additives.

Coating method and drying and curing conditions
Common coating methods include curtain coating, dipping, roller coating, spraying, brushing, electrostatic coating, etc. The coating process and parameters include the speed of the coating line, the temperature of the coating, the climatic conditions, and the coating Distance, film thickness, flashing time, number of coating channels, distribution ratio of each layer, etc. Different coating processes will correspondingly restrict the choice and collocation of additives. For example, when the same paint is sprayed, the leveling agent and defoaming agent required are characterized by fast leveling and certain defoaming properties. ; For curtain coating, only the general leveling rate is required, but the compatibility of the defoamer is better, and at least no film breakage can occur during the coating process.

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