Hydroxyethyl Cellulose Ether
Hydroxyethyl cellulose ether, a non-ionic surface active substance, is a commonly used cellulose ether organic water-based ink thickener. It is a water-soluble non-ionic compound and has good thickening ability to water.
It has many characteristics such as thickening, floating, bonding, emulsifying, film-forming, concentrating, protecting water from evaporation, obtaining and ensuring the activity of particles, and also has many special properties.
Dispersant
A dispersant is a surfactant that has two opposite properties of lipophilicity and hydrophilicity in the molecule. It can uniformly disperse the solid and liquid particles of inorganic and organic pigments that are difficult to dissolve in liquid, and at the same time prevent the particles from settling and agglomerating, forming an amphiphilic agent required for a stable suspension.
With the dispersant, it can improve the gloss, prevent the floating color, and improve the tinting power. Note that the tinting power is not as high as possible in the automatic coloring system, reduce the viscosity, increase the loading of pigments, etc.
Wetting agent
The wetting agent plays a vanguard role in the coating system, which can reach the surface of the substrate first to “pave the road”, and then the film-forming substance can be spread along the “road” that the wetting agent has traveled. In the water-based system, the wetting agent is very important, because the surface tension of water is very high, reaching 72 dynes, which is much higher than the surface tension of the substrate. Spread flow.
Antifoaming agent
Defoamer is also called defoamer, antifoaming agent, and foaming agent actually means to eliminate foam. It is a substance with low surface tension and high surface activity, which can suppress or eliminate foam in the system. Many harmful foams will be produced in the industrial production process, which seriously hinders the progress of production. At this time, it is necessary to add a defoamer to eliminate these harmful foams.
Titanium dioxide
The paint industry is the largest user of titanium dioxide, especially rutile titanium dioxide, most of which are consumed by the paint industry. The paint made of titanium dioxide has bright colors, high hiding power, strong tinting power, low dosage, and many varieties. It can protect the stability of the medium, and can enhance the mechanical strength and adhesion of the paint film to prevent cracks. Prevents UV rays and moisture from penetrating, prolonging the life of the paint film.
Kaolin
Kaolin is a kind of filler. When used in coatings, its main functions are: filling, increasing the thickness of the paint film, making the paint film more plump and solid; improving wear resistance and durability; adjusting the optical properties of the coating, changing The appearance of the coating film; as a filler in the coating, it can reduce the amount of resin used and reduce the production cost; it plays a guiding role in the chemical properties of the coating film, such as enhancing the anti-rust and flame retardancy.
heavy calcium
When heavy calcium is used in interior architectural paints, it can be used alone or in combination with talcum powder. Compared with talc, heavy calcium can reduce the chalking rate, improve the color retention of light-colored paints and increase the resistance to mold.
Lotion
The role of the emulsion is to cover the pigment and filler after film formation (the powder with strong coloring ability is the pigment, and the powder without coloring ability is the filler) to prevent powder removal. Generally, styrene-acrylic and pure acrylic emulsions are used for exterior walls. Styrene-acrylic is cost-effective , will turn yellow, pure acrylic has good weather resistance and color retention, and the price is slightly higher. Low-grade exterior wall paints generally use styrene-acrylic emulsions, and mid-to-high-end exterior wall paints generally use pure acrylic emulsions.
Summarize
In the production of coatings, functional auxiliary materials such as preservatives and thickeners are also added.
The above is the composition analysis of paint raw materials. With the continuous development of the economy, people’s requirements for coatings are also constantly changing. There will be more surprises waiting for us in the future paint market!
Post time: Feb-14-2023