pigment
The role of pigments in paints and coatings is mainly reflected in the following aspects
Ⅰ. Giving Color And Decorativeness
Pigment is an important source of color in paint coatings, which can give the coating rich color and decorative. Different pigments can be blended to produce a variety of bright and vivid colors to meet people’s demand for aesthetics and personalization. In the field of architectural decoration, automobile painting and so on, the selection and matching of pigments are crucial to enhance the overall visual effect of the products.
Ⅱ.Reduce Cost
Body pigment is cheap, although it does not have coloring effect, but it can increase the volume and viscosity of paints and coatings, so as to reduce the cost without affecting the properties of the coating.
Ⅲ.Give Special Function
With the development of science and technology, the functionality of pigment is also increasing. Some special pigments can give special functions to paint coatings such as electric conductivity, magnetic conductivity, fire prevention, sterilization, temperature indication, invisibility and so on, which can satisfy the needs of specific fields.
Ⅳ.Enhancement Of Coating Performance
1. Improve the strength of paint film: pigment, as a secondary film-forming substance in paint and coating, is closely bonded with the base material, which can increase the mechanical strength and hardness of the paint film, and improve the abrasion resistance and scratch resistance of the paint film.
2. Enhance the adhesion and anti-corrosion performance: pigment can reduce the shrinkage of paint, enhance the adhesion of paint film to the base material, and at the same time, improve the water resistance and corrosion resistance of the paint film, prolong the service life of the paint film.
3. Improve light resistance and weather resistance: some pigments also have the function of filtering out ultraviolet rays, which can improve the weather resistance of the paint film and prevent the paint film from aging and discoloration due to long-term exposure to the sun.
To sum up, pigments play a vital role in paint coatings, not only giving the coating color and decorative, but also enhancing the coating performance, reducing the cost and giving special functions. Therefore, the selection and matching of pigments are crucial in the formulation design and production process of paint coatings.
