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[Chemical Knowledge]：What are the upstream raw materials for polyurethane downstream? What do the downstream products contain?

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Polyurethane (PU) is a kind of polymer compound, which is formed by the reaction of polyol and isocyanate. It has excellent physical properties and chemical stability, so it is widely used in the field of chemical production raw materials. There are many upstream and downstream related products of polyurethane, and the following will introduce their upstream and downstream products respectively.

upstream products:

1. polyol: polyol is one of the main raw materials of polyurethane, commonly used polyols, polyester polyols and polyether polyols.
2. isocyanate: isocyanate is another main raw material of polyurethane, commonly used isocyanate and diisocyanate.

downstream products:

1. Polyurethane foam: Polyurethane foam is one of the most important downstream products of polyurethane. It has excellent heat preservation, sound insulation and shock absorption properties and is widely used in construction, home appliances, automobiles and other fields.
2. Polyurethane elastomer: Polyurethane elastomer has the advantages of high strength, high toughness, wear resistance, etc., and is widely used in machinery, chemical, medical and other fields.
3. Polyurethane coatings: Polyurethane coatings have excellent weather resistance, chemical resistance and decoration, and are widely used in construction, automobiles, furniture and other fields.
4. Polyurethane adhesive: Polyurethane adhesive has the advantages of high strength, high water resistance and weather resistance, and is widely used in construction, automobile, aerospace and other fields.

In short, the upstream and downstream related products of polyurethane are very extensive, involving various fields, such as construction, home appliances, automobiles, machinery, chemicals, medical, aerospace, etc. With the continuous development of science and technology, the application field of polyurethane and its related products is also expanding.

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