它们的特点如下：① 它们具有良好的柔韧性、附着力和机械强度。② 该颜料在涂料中具有良好的分散性。③ 该涂层具有良好的耐用性和耐光性。④ 漆膜饱满，耐溶剂、耐热性好，耐水性差。
As we all know, the color steel coil is coated with a layer of paint on the metal plate. However, there are differences between the paints. The purposes of the color steel coil made of different paints are also very different, just as the color steel
coil made of automobile is different from the color steel coil made of window. The following introduces various paints and their uses.
1. Alkyd resin coating
Alkyd resin is formed by polycondensation of polyols with polybasic acids and fatty acid esters. Its performance is closely related to the type and oil degree of modified vegetable oil. There are many kinds of alkyd resins.
Their characteristics are as follows: ① they have good flexibility, adhesion and mechanical strength. ② The pigment has good dispersibility in the coating. ③ The coating has good durability and light retention. ④ The paint film is plump, with good
solvent resistance and heat resistance, but poor water resistance.
The coating is widely used in building engineering doors and windows, wood furniture, ships, bridges, electromechanical products, optical instruments, all kinds of cars and so on.
2. Acrylic resin coating
Acrylic resin is polymerized by acrylic acid or methacrylate, eyes, amides and other monomers. Due to the different selection of monomers, thermoplastic and thermosetting coatings can be made.
has good hardness, light color, no yellowing and good durability. It is mainly used for aluminum alloy surface with good weather resistance and light retention required by aviation industry.
Thermosetting coatings have excellent physical and mechanical
properties, good surface fullness, strong weather resistance, good color retention, high brightness, high hardness, certain water and oil resistance. Most of them are cured by high temperature baking. It is suitable for cars, light industrial products,
household appliances, etc.
3. Polyester resin coating
Polyester resin is mainly composed of diol and dibasic acid. Polyester containing coatings can obtain a variety of combinations of physical properties, that is, they can have both hardness
and flexibility. They also have excellent chemical resistance, heat resistance and good formability. They are mainly used for building linings, transporters, etc.
4. Silicon modified fine coating
It is composed of acrylic acid or polyester
and silicide. It has good appearance durability, non pulverization and gloss retention. Although limited in flexibility, they are suitable for general medium roll forming for construction. Typical uses are external occasions, especially prefabricated
industrial buildings and residential side walls.