Coatings are generally composed of film-forming substances, fillers (pigments and fillers), solvents and additives. According to the performance requirements, sometimes the composition will change slightly, for example, there is no pigment and filler in varnish and no solvent in powder coating.
It belongs to organic chemical polymer material, and the formed coating film belongs to polymer compound type. According to the classification of modern chemical products, coatings belong to fine chemical products. Modern coatings are gradually becoming a multifunctional engineering material and an important industry in the chemical industry.
The paint is a viscous oily pigment, which is flammable under wet conditions, insoluble in water, slightly soluble in fat, soluble in alcohol, aldehyde, ether, benzene and alkane, soluble in gasoline, kerosene and diesel oil.
Extended data
Generally speaking, paint can be coated on the surface of the coated object and can form a continuous film with firm adhesion. It can be inorganic, such as electroplating copper, nickel and zinc. It can also be organic, such as most organic polymer materials, which constitute the main part of the coating market.
Auxiliary film-forming substances: including various additives and solvents. Various additives play a very important role in the production process, storage process, use process and film forming process of coatings.
Although the dosage is small, it has a great influence on the performance of paint film. It can't even form a paint film, such as drying, sinking, caking and crusting.
Waterborne paints need additives to meet the requirements of production, construction, storage and film formation. The level of paint additives also represents the paint level of a country. Solvent, also known as "dispersion medium" (including all kinds of organic solvents and water), mainly dilutes film-forming substances to form viscous liquid, which is convenient for production and construction. The mixture of film-forming base material and dispersion medium is usually called coating.
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