Water-based paint formulation design knowledge, skills (worth collecting)!

Water-based coatings, including water-based wood paints, are water-dispersed media and thinners. Different solvent-based coatings are not commonly used, and their formulation system is a more complex one. When formulating, we should not only pay attention to the type of polymer, the properties of the emulsion and dispersion, but also the rational selection of various additives and take into account the interaction between the components for a reasonable

. Sometimes special additives are selected for special requirements, resulting in suitable formulations.
01, the basic composition of the formula
1, water-based resin: this is the substation of the film, determines the main function of the paint film.
2, film-forming additives: after water evaporation, so that emulsion or dispersive particles form a uniform dense film, and improve the film-forming under low temperature conditions.
3, anti-foaming agent and de-foaming agent: inhibit the production process in the paint liquid produced bubbles and can make the resulting bubbles escape from the liquid surface and break bubbles.
4, leveling agent: improve the construction performance of the paint, the formation of a flat, smooth coating.
5, wetting agent: improve the wetting performance of lacquer liquid on the substrate, improve the leveling, increase the adhesion of the paint film to the substrate.
6, dispersant: promote the dispersion of pigments in the paint solution.
7, fluidizer: to paint to provide good fluidity and leveling, reduce the paint process of ills.
8, thickener: increase the viscosity of the paint liquid, improve the thickness of the wet film once coated, and putty and solid paint has anti-precipitation and anti-layering effect.
9, preservatives: to prevent paint solution in the storage process mold.
10, flavor: make the lacquer liquid have a pleasant smell.
11, colorant: mainly for color paint, so that water-based paint has the desired color. Colorants include pigments and dyes, pigments for solid paint (painting without exposing wood grain), dyes for transparent paint (painting of exposed wood grain).
12, fillers: mainly used in putty and solid paint, increase solid points and reduce costs.
13, pH regulator: adjust the pH of the paint liquid, so that the paint liquid stability.
14, wax lotion or wax powder: improve the paint film's scratch resistance and improve its feel.
15, special additives: for the special requirements of water-resistant paint additives, such as anti-rust agent (iron tank packaging to prevent premature rust), hardener (improve the hardness of the paint film), anti-lighting agent (reduce paint film gloss), anti-scratching agent, slippery agent (improved paint film hand anti-adhesive agent (preventing coating laminated adhesion), crosslinking agent (making a two-component paint to improve overall performance), water repugnant agent (making the coating have a lotus leaf effect), wear inhibitor (increasing the wear resistance of the coating), UV absorbent (outdoor paint anti-aging, prevent yellowing) and so on.
16, ionized water: formula design often also need to add a small amount of deionized water in order to paint.
02, water-based multicolor paint formulation design techniques
supery paint
1, cellulose is the key to constitute the gel system, must be added;
2, protective glue helps to form the internal "House of Cards" structure, improve the toughness of colorful particles
3, the viscosity of the base paint affects the rough form, VS affects the flatness of the paint film,
4, surf activity can effectively form the "House of Cards" structure, TSPP de sticky (can be considered structural wetting);
5, and the anti-adhesive compatible emulsion, particles easy to expand, water resistance difference;
1
, the appropriate amount of protective glue helps particles to form a
"house of cards" shell, to avoid secondary aggregation;
color matching, paint
1, and poor compatible with the protection of rubber emulsion, multicolor paint adhesion, false plastic viscosity;
2, containing a strong polar cation group thickener easy to cause colored paint thick;
3, emulsion is conducive to improve the effect of opening cans, conducive to secondary repair;
4, colorful paint KU in about 90, large particles can also be adjusted to 100-120.
03, the production and preparation of water-based coatings
water-based coatings are a kind of paint with water as a solvent, it as a substitute for solvent-containing coating systems, has gradually been recognized, in recent years, because the ideal water-based coatings on the human ecological environment pollution-free and transport and use performance has certain advantages, its products were quickly accepted by the market, and called high-tech replacement products.
The following is a brief talk about the main points in the preparation of water-based coating production process:
1, formulation materials should be as far as possible to choose a good dispersion of pigments and ultra-fine fillers, so as to improve product quality under the premise of cancellation of grinding operations, simplify production processes, improve production efficiency
;
3, before the addition of liquid thickener, should try to use 3 to 5 times water thinning, slowly added under full stirring, from the concentration of anti-local thickener is too high to make the emulsion group or form a glue bundle, thickener can be placed in the slurry dispersed into the slurry to fully stir to avoid the above problems;
4, the way to add the desiccant is half added to the slurry, the other half is added to the painting process, which can make the de-foaming effect better; Affects the quality of the coating.
.