In addition to containing a large number of polar urethane groups, polyurethane coatings also contain ester, ether, unsaturated grease double bonds, urea groups, biuret and allophanate groups. Polyurethane raw materials and formulas are diverse. , making polyurethane coatings have excellent performance.

① The coating film is wear-resistant and has strong adhesion. Polyurethane coating film has excellent mechanical properties. The coating film is hard, flexible, bright, has excellent wear resistance, and has high adhesion to the substrate. Therefore, it is widely used in floor paint, deck paint, and metal, cement, rubber, and plastic coatings. Paint, etc.

② The coating film has excellent anti-corrosion properties. Most polyurethane coatings are resistant to oil, acids, alkalis, salts and other chemicals and industrial waste gases.

③ Wide construction temperature range, polyurethane coating can be cured at room temperature or heated and baked. The construction adaptation season is long and the construction environment adaptability is good.

④ The raw material formula of polyurethane can be adjusted according to needs to obtain various polyurethane coatings, from extremely hard coatings to extremely flexible elastic coatings. Highly elastic coating films can be obtained, which can be used for coating soft materials such as leather, rubber, and fabrics.

⑤ Excellent electrical performance. It is suitable for making enameled wire paint. The polyurethane enameled wire has the characteristics of self-welding and self-adhesiveness, and is especially suitable for telecommunications and instrument coils.

⑥ Can be mixed with a variety of resins. Polyurethane resin can be mixed with polyester, polyether, epoxy resin, alkyd resin, silicone, acrylic resin, cellulose, chlorine-acetic copolymer resin, asphalt, drying oil, etc., so it can be formulated into many new products according to different requirements. Variety of coatings.

⑦ Polyurethane coating has both decorative and protective properties and can be used for coating high-end woodware, pianos, large passenger aircraft, etc.

⑧ Good temperature resistance. Polyurethane has good low temperature resistance. Some polyurethane coatings have good high temperature resistance. For example, the combination of isocyanate and trimellitic anhydride can produce high-temperature resistant insulating paint with properties close to those of polyimide.

Polyurethane coatings have the above unique properties, so they have been widely used in national defense, infrastructure, chemical industry, anti-corrosion, electrical insulation, wood coatings and other aspects. The output is increasing day by day, new varieties appear one after another, and the development is rapid. However, its price is more expensive than ordinary paints, so it is currently mostly used in places with higher requirements.