Automotive coatings refer to coatings applied to car bodies and parts. From the perspective of the industrial chain, upstream raw materials are mainly some chemicals, including resins (epoxy resin, acrylic resin, polyurethane, phenolic resin, etc.), inorganic pigments (titanium dioxide, iron oxide, etc.), organic pigments (azo pigments, etc.), organic solvents (isopropanol, butanone, PMA, etc.), and additives (dispersants, emulsifiers, etc.), The downstream is mainly used in the whole automobile and its parts.

From the perspective of vehicle painting, it can be divided into two categories: original vehicle paint (OEM) and automotive touch up paint, which have great differences in product use, structural design, coating requirements, end customers, sales mode, etc. The original paint is mainly used for the coating of car bodies and parts by automobile manufacturers. Large batches of assembly line coating require high temperature baking, while the automobile repair paint is mainly used for the repair of body paint in the later period. It can be roughly understood that the original paint is mainly affected by the car production, while the car touch up paint is mainly affected by the car ownership.

Other classification methods. The fourth generation of automotive coatings currently used in China are represented by the fourth and fifth generation of cathodic electrophoretic coatings, high-quality acrylic resin coatings with acid rain resistance and scratch resistance, acrylic polyurethane coatings, top coat colors of metallic and natural colors, and coatings that are suitable for car three-layer coating systems. According to different classification methods, it can be divided into water-based coatings, solvent coatings, powder coatings, etc; Primer, color paint, finish paint, etc; Waterproof coating, thermal insulation coating, etc.

Automobile coating structure. Automobile painting needs to be carried out in sequence according to the process. With the development of new painting technology, the methods of automobile painting are becoming more and more abundant, and more and more beautiful automobile colors will appear in the future. In automobile painting, automobile paint is one of the essential materials.

At present, car body coatings include at least four layers: electrophoretic primer, intermediate coat, color paint and varnish. Each layer contains complex process steps, and before coating, it shall undergo degreasing, rust removal, phosphating and other pre-treatment. After coating, the coating quality shall be tested and evaluated.

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