Do you know the composition and function of water-based latex paint?

Base material (film former): synthetic resin emulsion (styrene acrylic, vinegar acrylic, pure acrylic, silicon acrylic, etc.).
Function: The emulsion is the non-volatile part of the coating, also known as the bonding material, which is the basis of the coating film. It can bond the pigments and fillers together and adhere to the surface to form a film. The grade and performance of the coating are mainly determined by the film-forming material.

Pigment: titanium dioxide, zinc oxide, zinc barium white (BaSO4.ZnS) and other pigments.
Function: It is a micro-powder colored substance. It is insoluble in water or oil medium, but can be uniformly dispersed in the medium to form a uniform suspension. Coated on the surface of the object, it can give the coating film hiding power and color.

Fillers: CaCO3 (light, heavy), talc, kaolin, etc.
Function: It is an extender pigment, mostly white powder without covering power and tinting power. Its price is low. It can increase the thickness of the coating film, improve the durability, wear resistance and other mechanical strength of the coating film, and at the same time can reduce the coating. cost.

Solvent: It can dissolve and dilute the film-forming substance of the paint, and can also reduce the viscosity of the paint. However, after the coating film is formed, it remains in the middle of the coating film. It is a volatile substance (the solvent of latex paint is water, which is cheap, widely available, and non-toxic)

Auxiliaries: dispersants, wetting agents, thickeners, film-forming auxiliaries, mildew inhibitors, etc. Function: A material that improves the processing performance, construction performance, storage performance and film performance of coatings.
1. Dispersant and wetting agent: It is beneficial to the dispersion of pigments and fillers. Wetting agents affect the affinity of the coating base and affect leveling.
2. Film-forming aids: reduce the film-forming temperature, which is conducive to film-forming in slightly cold weather and improves the performance of the paint film.
3. Defoamer: defoaming, which is convenient for defoaming during processing and construction.
4. Antifungal agent: prevent the paint itself from stink and the coating film from mildew in a humid environment.
5. Thickener: Generally, there are hydroxyethyl cellulose, alkali-soluble type and associative type.