Polyurethane is a widely used material, with various types and versatile applications. Here are the main types and applications of polyurethane:
1. Cast polyurethane products: These are made entirely of polyurethane, including sheets, bars, seals, casters, screens, tire fillers, etc. Their application is very extensive.
2. Polyurethane coatings: Polyurethane coatings can be divided into single-component and two-component coatings. Single-component polyurethane coatings include oil-modified polyurethane coatings, moisture-cured polyurethane coatings, and closed-cell polyurethane coatings (high-temperature baking type). Two-component polyurethane coatings are usually composed of isocyanate prepolymers and hydroxyl-containing resins. Depending on the hydroxyl-containing component, they can be classified as acrylic polyurethane, alkyd polyurethane, polyester polyurethane, polyether polyurethane, epoxy polyurethane, etc. They are widely used in wood coatings, automotive repair coatings, anti-corrosion coatings, floor coatings, electronic coatings, special coatings, polyurethane waterproof coatings, etc.
3. Polyurethane foam: Polyurethane foam can be divided into hard foam and soft foam, high-density and low-density foam, polyester-type and polyether-type foam, TDI-type and MDI-type foam, bulk foam, and molded foam. They are used in building insulation, packaging materials, furniture cushioning materials, automotive industry, etc.
Other polyurethane products: Polyurethane can also be used in textiles, artificial leather, shoe soles, and other widely used products.
Overall, polyurethane is a versatile material that has contributed to many fields.
