Water-based paints, including water-based wood paints, use water as the dispersion medium and diluent. Unlike solvent-based coatings that are not commonly used, its formulation system is a more complex system. When formulating, not only the type of polymer, the performance of emulsion and dispersion should be paid attention to. It is also necessary to rationally select various additives and take into account the interaction between the components for reasonable matching. , and sometimes select some special additives according to special requirements, and finally form a suitable formula.
Basic composition of the recipe
1) Water-based resin: This is the base material for film formation, which determines the main function of the paint film.
2) Film-forming aids: After water volatilizes, it makes the emulsion or dispersion particles form a uniform and dense film, and improves the film-forming properties under low temperature conditions.
3) Anti-foaming agent and defoaming agent: Inhibit the bubbles generated in the paint liquid during the production process and make the generated bubbles escape the liquid surface and break the foam.
4) Leveling agent: Improve the construction performance of the paint and form a smooth and smooth coating.
5) Wetting agent: Improve the wetting performance of the paint liquid on the substrate, improve the leveling property, and increase the adhesion of the paint film to the substrate.
6) Dispersant: Promote the dispersion of pigments and fillers in the paint solution.
7) Rheological additives: provide good fluidity and leveling properties for the paint, and reduce the disadvantages in the painting process.
8) Thickener: Increase the viscosity of the paint liquid, increase the wet film thickness of a coating, and have anti-sedimentation and anti-delamination effects on putty and solid-color paint.
9) Preservatives: Prevent the paint liquid from mildewing during storage.
10) Fragrance: Make the paint liquid have a pleasant smell
11) Coloring agent: mainly for colored paints, making water-based paints have the desired color. Colorants include pigments and dyes. Pigments are used for solid color paints (paints that do not reveal wood grain), and dyes are used for transparent paints (paints that reveal wood grains).
12) Filler: Mainly used in putty and solid color paint to increase solid content and reduce cost.
13) pH adjuster: adjust the pH value of the paint solution to stabilize the paint solution.
14) Wax emulsion or wax powder: improve the scratch resistance of the paint film and improve its feel.
15) Special additives: additives added according to the special requirements of water-based paints, such as anti-rust agent (iron can packaging to prevent premature rust), hardening agent (increasing the hardness of the paint film), matting agent (reducing the gloss of the paint film), Anti-scratch agent, slip agent (to improve the feel of the paint film), anti-blocking agent (to prevent coating from lamination and adhesion), cross-linking agent (to make two-component paint, improve overall performance), water-repellent (to make the coating With lotus leaf effect), anti-wear agent (increase the wear resistance of the coating), ultraviolet absorber (anti-aging and anti-yellowing of outdoor paint), etc.
16) Ionized water: A small amount of deionized water is often added to make paint
