General knowledge of coating: introduction of coating knowledge in automobile

Core tip: Automotive in-process coating, also known as two-layer slurry, is used for automotive primer and topcoat or primer paint It is required that it can not only firmly adhere to the primer surface, but also can be easily combined with the top coating on it, which plays an important role in connecting the preceding and the following In addition to the good adhesion and binding force between the upper and lower coatings, the intermediate coat shall also have good mechanical properties, which can provide the protective performance suitable for the top coat; the intermediate coat shall also have the filling property, so as to eliminate the holes, lines, etc on the surface of the coated object, so as to make a flat surface, so as to obtain a flat and full coating after the finishing paint is applied, so as to improve the performance Paint agent, top 10 Chinese wall paint brands Recommended introduction: interior wall paint and exterior wall paint can achieve beautiful, clean and pleasant effects, but the effects in different environments are different, so the color of the paint will be different There are ten brands of Chinese paint, ten brands of global paint, ten brands of Chinese wall paint, and ten brands of Chinese paint, Famous trademark of Chinese paint and coating In private rooms, most of us choose according to our own personality, personal hobbies and living habits The younger generation will choose the interior wall paint with rich colors and bright colors, while the older ones will have some working experience Home of paint news: automotive paint is also known as two-layer slurry, which is used for automotive primer and topcoat or primer paint It is required that it can not only firmly adhere to the primer surface, but also can be easily combined with the top coating on it, which plays an important role in connecting the preceding and the following In addition to good adhesion and adhesion between the upper and lower coatings, the intermediate coat shall also have good mechanical properties, which can provide the protective performance suitable for the top coat; The intermediate coat shall also have the filling property to eliminate the holes, lines, etc on the surface of the coated object, so as to make a flat surface, so as to obtain a flat and full coating after the application of the finishing paint, improve the freshness and fullness of the whole paint film, so as to improve the decorative property of the whole coating; it shall also have a good burnishing property, so as to obtain a flat and smooth surface after the burnishing Putty, two-layer primer and sealing primer are all intermediate layers of coating matching coating, that is, intermediate coating Putty is used to fill the uneven place of the construction object, generally in the form of thick paste, with high pigment content, poor mechanical strength of the coating, and easy to fall off Therefore, at present, a large number of new cars produced by the assembly line no longer use putty, sometimes only used for car repair Sealing paint is the last intermediate layer coating before application The coating is bright or semi bright, which is generally used in coatings with high decorative requirements (such as car repair) This kind of coating requires a sealing paint before application of the top coat to fill the traces left by the above-mentioned bottom layer after polishing, so as to obtain a satisfactory flat bottom layer At present, the original coating of new cars generally uses two coats of primer as the intermediate coating The base material selected is similar to the base material used for primer and finish coat, so as to ensure a firm binding force and good matching with the upper and lower coatings Polyester resin, amino resin, epoxy resin, polyurethane resin and bonding resin are used as the base materials for the second intermediate coating; titanium white, carbon black, barium sulfate, talcum powder, fumed silica are used as the pigments and fillers The second intermediate coat is generally of high solid content, which can make enough film thickness (about 40um); it has good mechanical properties, especially good stone impact resistance; in addition, it also has the characteristics of flat, smooth surface, good abrasiveness, corrosion resistance and water resistance, which plays an important role in the appearance and performance of the whole automobile paint film Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,