What is automotive car paint?
Release date: 2018-07-19 14:00 editor: Jinwei Chemical Co., Ltd.
Automotive car paint is primarily to protect the body against corrosion, followed by car but also increase the degree of it beauty, most owners are an expression of individuality.
The so-called automobile car paint, sprayed on the car paint car paint called. Automotive paint is a kind of paint. Automobile spray paint, not only the body surface to form a protective film, the body is not susceptible to corrosion, it can also extend the life of the vehicle, but also gives a beautiful enjoyment. Different gas paint have different effects, choose different kinds of paint, different colors, you can show a different personality out of the bus, therefore, essential to automotive paint car itself.
Automotive paint and other paint different, because the car itself is expensive, coupled with perennial experience seasons of experience, the performance of demanding automobile car paint, automobile paint film has not only to do good mechanical properties, good fullness, luster high, but also to achieve good adhesion, high hardness, high scratch resistance, but also to have excellent weather resistance, scratch and abrasion resistance, gloss persistence, and excellent resistance to gasoline, alcohol-resistant, acid, alkali resistance, salt spray and other properties.
Automotive car paint are generally baked paint. Inside the depot, frame, body welding is completed, after the repair manual Body, the next process is paint. General speaking, to the first primer, the white body is immersed in a syrup-like paint tank, remove the dried paint; and then into the clean room, using an electrostatic spray painting process finish, and then drying temperature of about 200 degrees. Some will be a layer of varnish.
Automotive car paint mainly composed of a resin, pigments, additives, fillers, curing agents, solvents and other components, metallic automotive paints have added glitter powder (aluminum powder), pearl, lacquer Mica added.
A resin (film material)
B pigments (including extender pigments, anti corrosive pigments, coloring pigments)
A. resins can be divided into: ① ② natural resins synthetic resins (comprising: a thermoplastic, thermosetting, self-cross linking)
1, natural resin Description: The insect or tree secretions. Ingredients: Rosin, shellac
2. Description of the thermoplastic synthetic resin: softening at high temperatures, easily solvent.
Ingredients: vinyl, the CAB cellulose acetate butyrate, nitrocellulose.
3, a thermosetting synthetic resin Description: heating is not easy to soften, high hardness, solvent.
Ingredients: melamine, epoxy, acrylic.
4, artificial tree self-cross linking Description: chemical reaction and curing two-component mixing.
Ingredients: unsaturated resin, a polyester resin, a polyurethane resin.
B color classification:. ① anti corrosive pigments ② ③ coloring pigment extender pigments (inorganic pigments, organic pigments).
1, Anti corrosion paint: primer widely used to enhance corrosion.
2, the extender pigment: improve the film thickness and grinding, and is mainly used for primer paint and other coatings.
3, a coloring pigment: providing a color hue and opacity. (Inorganic pigments means: metal oxides, usually dark colors such as titanium dioxide, red iron oxide pigments and other organic pigments means: There are bright colors, but hiding poor as phthalocyanine blue, a flat red etc.)
C. Aid: is a compound having a variety of special properties. Under normal paint is added in small amounts in order to obtain or improve specific properties of paint, but the largest proportion in the paint does not exceed 5%.
Auxiliary are dispersing agents, foam curing accelerators, anti-loss additives, softeners, anti-corrosion additives, leveling agents, anti-settling agents, UV absorb, antioxidants, anti-pinhole agents
The important role of aid:
Additives for paints is very important, because any thing with color may fade in the sun, automobile paint is the same, it will fade in the sun pigment, then, co-inside with paints agent is very important. For example, ultraviolet absorb, antioxidants, etc. These additives can be added to extend the fade time, to prevent premature aging paint. Very many cases, aid is good or bad to some extent determines the quality of paint.
D. packing: refers to an extender pigment for paint, the increase in film thickness and abrasive.
E. curing agent: a self-cross linking type resin, through a chemical reaction when two-component mixing and curing.
F. Solvent: liquid having a variety of uses. Soluble resin to adjust the viscosity, making it easier to mix pigments and resins, the paint has to ensure that the application viscosity, can also be used to clean the gun, cleaning stick to the hands, the body of excess paint.