Secondary film-forming substances: including various pigments, physique pigments and antirust pigments. Pigment provides color and hiding power for paint film, and improves the protective performance and decorative effect of paint. Pigments with good weather resistance can improve the service life of coatings.
Constitution pigment can increase the thickness of paint film, and make use of its "flake-like, needle-like" structure to form a fish-scale paint film through the accumulation and overlapping of pigments, thus improving the service life of paint film and the waterproof and antirust effects. Anti-rust pigments can prevent the surface of objects from being corroded by atmosphere and chemicals and the surface of metals from being corroded through their own physical and chemical anti-rust effects.
Physical and chemical properties:
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.
No matter the variety or form of coatings, they are all composed of three basic substances: film-forming substances, secondary film-forming substances and auxiliary film-forming substances: film-forming substances, also known as adhesives, and film-forming substances are mostly organic polymer compounds, such as natural resins (rosin, paint) and paints (tung oil, linseed oil, soybean oil, fish oil, etc. ).
Synthetic resin and other mixed components are made by high temperature reaction, and there are also inorganic paints (such as inorganic zinc-rich paints). Various film-forming substances are classified as ***xxx according to the national standard. It is the main body of paint and determines the performance of paint film. If there is no film-forming substance, pure pigments and auxiliary materials cannot form a paint film.