Paint, in Chinese tradition, is called paint. "Paint technology" which is more authoritative in China's coating industry is defined as this: "the coating is a material. This material can be coated on the surface of the object with different construction techniques to form solid, strong, continuous solid film with strong adhesion. The film formed in this way is commonly referred to as film, also known as paint film or coating.

Lacquer products with organic solvents as diluents or with high solids and no solvents are called paints (paints), while waterborne paints are the only diluents with clear water. Generally speaking, waterborne paint is a kind of paint which can be used without toxic diluent and curing agent instead of painting.

Function of coating

1) protection function: anticorrosive, waterproof, oil resistant, chemical resistant, light resistant and temperature resistant.

Objects exposed to the atmosphere are eroded by oxygen and water, resulting in metal corrosion, wood decay, cement weathering and other damage phenomena. Coating on the surface of objects to form a layer of protective film can prevent or delay the occurrence and development of these destructive phenomena, and prolong the service life of various materials.

2) decoration function: color, luster, pattern and smoothness. Different materials are coated with paint, so that they can get colorful and colorful appearance.

3) other functions: marking, antifouling, insulation, flame retardancy and other special functions.

Composition of coatings

The coating consists of four parts: film-forming material, pigment, solvent and auxiliaries.

Film forming material is the foundation of the coating. It plays a decisive role in the performance of the coating and coating. It has the function of forming the coating of the other components in the adhesive coating. Now synthetic resins are widely used as film-forming materials, such as alkyd resin, acrylic resin, chlorinated rubber resin, epoxy resin and so on.

Pigment is a major component of a colored coating (paint), which makes the coating color.

Solvent - can dissolve or disperse the film forming material in the coating into a homogeneous liquid to facilitate the construction of the film, which can volatilize from the film to the atmosphere after construction. In principle, solvents do not form film and should not be deposited in the coating.

Auxiliaries, also known as auxiliary materials for coatings, can not form a film independently. It can be used as a component of the film after coating film. The function of auxiliaries is to improve the performance of a specific aspect of paint or coating. A variety of auxiliaries can be used in a coating to give full play to its different functions.