Polyurethane coating is the most common type of coating, can be divided into two-component polyurethane coatings and one-component polyurethane coatings.
Two-component polyurethane coating is generally composed of isocyanate prepolymer (also known as low molecular weight urethane polymer) and hydroxyl-containing resin two parts, commonly known as the curing agent component and the main component. This type of paint a lot of varieties, the application is also very wide, according to the different hydroxyl-containing components can be divided into acrylic polyurethane, alkyd polyurethane, polyester polyurethane, polyether polyurethane, epoxy polyurethane and other varieties. Generally have good mechanical properties, high solids content, performance in all aspects are better. It is a kind of paint varieties with promising future. The main direction of application of wood coatings, automotive repair coatings, anti-corrosion coatings, floor paint, electronic coatings, special coatings, polyurethane waterproof coating. Drawback is that the construction process is complex, demanding on the construction environment, the film prone to ills.
One-component polyurethane coatings mainly urethane oil coatings, moisture curing polyurethane coatings, polyurethane coatings and other varieties closed. Application surface is not as good as two-component paint, mainly used for floor coatings, anti-corrosion coatings, pre-coil coating, the overall performance of the two-component paint as comprehensive.