Why does paint go bad easily？
1. What are the main components of paints and coatings?
The main components of paint include the following five parts:
Oil: including dry oil and semi-dry oil, is one of the main film forming substances.
Resins: including natural and artificial resins, are also part of the main film forming substances.
Pigments: including coloring pigments, physical pigments and rust pigments, specific varieties are quite wide, for the secondary film forming substances.
Diluent: including a solvent and diluent, used to dissolve the substance and adjust the consistency, as an auxiliary film forming substance.
Auxiliary materials: including drying agent, curing agent, plasticizer, moisture-proof agent. It is also an auxiliary film forming substance.
2. Composition of decorative coating
It mainly consists of three parts:
Main film forming substance: also known as adhesive and fixing agent, is the basis of the composition of coating.
Secondary film-forming substance: is also an integral part of the film, but it cannot be separated from the main film-forming substance to form the film alone
Auxiliary film forming substance: including solvent and auxiliary material. The former such as gasoline, smoke oil, rosin, benzene, ethyl acetate, acetone and so on; The latter such as curing agent, emulsifier, thickening agent, drying agent, wetting agent, dispersant, defoaming agent, initiator, catalyst, stabilizer, anti-aging agent, antifreeze and so on.
Composition of paint
Paint, in Chinese tradition called paint. Coating Technology, a relatively authoritative book in the Chinese coating industry, is defined as follows: coating is a kind of material, which can be coated on the surface of objects with different construction techniques to form a solid film with firm adhesion, certain strength and continuity. The film formed in this way is known as the coating film. Also known as lacquer or coating. Early most of the main raw materials with vegetable oil flavor, so called paint. Both traditional coatings with natural substances as raw materials and modern coatings with synthetic chemical products as raw materials belong to organic chemical polymer materials, and the coating film formed belongs to the type of polymer compounds. According to the classification of modern chemical products, coatings belong to fine chemical products. Modern coatings are gradually becoming a kind of multi-functional engineering materials, which is an important industry in the chemical industry.
