The role of adding mildewcide to exterior paint LX-300

LX-300 is a highly concentrated, broad-spectrum, environmentally friendly anticorrosive fungicide for coatings, suitable for water-based, formaldehyde sensitive systems. This product does not contain organic solvents and formaldehyde, prevent water-based products in the liquid state by microbial damage, widely used in latex paints, polymer synthetic emulsions, adhesives, enamels, detergents, fillers and sealants, and metalworking fluids and other water-based systems.

It has good compatibility with all kinds of surfactants and other chemical raw materials, and has no effect on the color, adhesion, leveling, stability and other properties of coatings.

Defoamer
In the paint mixing and grinding stage, due to the foaming properties of wetting and dispersing agents, it is sometimes necessary to add anti-foaming defoamers to avoid the negative impact of bubbles on the grinding efficiency during the production process, the paint overflows the tank, and the packaging For the measurement problem in the tank or the waiting time to wait for the elimination of bubbles after filling, this type of defoaming agent usually chooses the polymer type or the polysiloxane type defoaming agent with strong foam suppression. At the same time, in order to help the gas contained in the pores of pigments and fillers to be quickly replaced and removed, it can also be used with a wetting and dispersing agent with strong wetting properties (such as Deqian Dispone r912). The most obvious effect of this combination is reflected in the wood primer. Especially the formula containing zinc stearate not only has less bubbles in the production process, but also can exert the best wetting and filling effect on the substrate when the primer is painted, which not only solves the problems of manufacturing, but also can be improved simultaneously. The application performance of the finished paint.

Although the defoamer added at this stage focuses on the foam suppression provided by incompatibility, it is still necessary to pay attention to the muddy coating caused by excessive incompatibility, affecting the clarity of the coating film, shrinkage of the coating film, and causing Painting repair or repainting problems. These can be observed and evaluated by standing, boarding, recoating or top coating after the coating is produced. If the above-mentioned negative effects are caused, the addition amount can be reduced or the defoamer with better compatibility can be retested and evaluated.

Anti-settling and thixotropic agent
The purpose of the anti-settling and thixotropic agents added at this stage is not to prevent the problem of anti-settling of pigments and fillers in the paint production process, but to focus on the anti-settling of the finished paint in the storage process, the prevention of hard precipitation, and the rheological requirements during coating ( Anti-sagging, but low impact on leveling) and the arrangement and orientation of metallic pigments. The reason why it is added in the grinding and dispersion stage is mainly because various anti-settling and thixotropic agents will have a certain force with pigments and fillers.