Because of its rich colors and convenient construction, water-based multi-color coatings can obtain a strong three-dimensional decorative effect after one spraying, and are cost-effective, convenient for renovation and updating, safe and environmentally friendly, and are the development direction of exterior wall coating projects. Water-based multi-color coatings are different from traditional latex coatings. Latex coatings are single-phase and single-color uniform, and the product quality is relatively stable. Water-based multi-color coatings are a capsule system in which multi-color and multi-phase particles coexist, and product quality control is particularly important. The essential.
common problem
1. Layering. The layering of water-based colorful paint means that in the finished product barrel, some particles float on the surface of the protective glue liquid and directly contact with the air, so that a layer of protective glue film wrapped on the surface of the particles gradually becomes thinner due to evaporation until it is damaged. The loss seriously affects the uniformity, workability and decoration of the coating film.
2. Bleeding. The dispersion medium of the water-based colorful paint obviously presents the same color as the color particles, or the dispersion medium becomes a milky turbid liquid, and in serious cases, many fine flakes appear in the turbid liquid.
3. Dispersion medium flocculation. The medium forms a cotton-like colloid that is not easy to disperse, and wraps all the color particles in it. And the longer the storage time, the more serious the problem.
4. The color grains are dull and dull. Most cellulose-based thickeners, defoamers, and some types of pigments have matting effects. Often white color particles have better luster, while other colors of color particles have poorer luster. The reason is that white color particles generally use neutral titanium dioxide as a pigment and filler. Pigments are highly alkaline or acidic, which will easily cause the color particles to lose their luster.