Paint is a substance that is applied to the surface of an object and can form a continuous film that is firmly attached. It is generally composed of oil, resin, pigment, thinner drier and other auxiliary materials. Among them, oil and resin are the film-forming base materials of coatings, which constitute the basis of coatings and determine the basic properties of coatings. They are called the main film-forming substances. Pigments and fillers cannot form a film by themselves. They are mainly used for coloring and improving the performance of the paint film. They play a secondary role in coatings and are called secondary film-forming substances. Others are called auxiliary film-forming substances, which mainly improve certain properties of the coating.
The pigment in the paint has a certain hiding power. It can not only cover the original color of the surface of the coated object, but also impart a bright color to the coating film to achieve the effect of beauty and decoration. At the same time, the pigment and the fixing agent are tightly combined and integrated, which can enhance the mechanical strength and adhesion of the coating film, prevent cracks, and increase the thickness of the coating film, prevent the penetration of ultraviolet rays and moisture, improve the aging resistance of the coating film, and extend its use life.
Iron oxide pigments are mainly used as pigment colorants in the production of coatings. They have the function of coloring and hiding. They are secondary film-forming substances and have certain effects on the rheology, chalking resistance, weather resistance and chemical resistance of the coating. The role of. In the production of coatings, iron oxide pigments must have a pure color, good hiding power and tinting power, and do not change color within a certain period of time, that is, strong weather resistance.
Regardless of solvent-based or water-based coatings, if iron oxide pigments are used, their role is not only to cover and decorate, but also to improve the physical and chemical properties of the coating, enhance chemical stability, and even improve hiding power, coloring power, and corrosion resistance. Resistance, light resistance, weather resistance, enhance the mechanical strength and adhesion of the coating film, prevent cracks, and increase the thickness of the coating film, prevent the penetration of ultraviolet rays and moisture, thereby delaying aging and extending the life of the coating film.
Among the pigments, due to the clear and pure color of iron oxide pigments, soft and harmonious hue, high tinting power, fine and uniform particle size, it has excellent pigment performance. Because it is non-toxic, non-bleeding, low cost, and can form a variety of different tones, and people's preference and demand for soft, quiet, and pure color decorative colors, it is widely used in coatings, paints, and inks. middle. Iron oxide pigments are used in building interior and exterior wall coatings, brick painting, decorative paper, ships, automobiles, pipelines and traffic corrosion, wood and metal furniture, leather, coil coating, toys and daily necessities and other coatings.
Among coating products, architectural coatings that consume the most iron oxide pigments account for more than 60% of the total iron oxide pigments used in coatings, followed by municipal facilities, ships, vehicles, pipelines, oil tanks, iron towers, traffic signs, and guardrails. Industrial coatings such as, containers, furniture and leather account for about 35%, and special coatings account for about 5%. Coatings have developed from oil-based coatings to synthetic resin coatings. Various coatings are inseparable from the application of pigments. In particular, iron oxide pigments have become an indispensable pigment variety in the coating industry.
