What are the upstream raw materials for polyisocyanates? What do the downstream products contain?

I've found that Polyisocyanate(Polyisocyanate, PI) is an crucial chemical raw material, broadly applied in polyurethane, elastomers, coatings, adhesives and other fields. For example There are many upstream and downstream related items of polyisocyanates, and the main upstream and downstream items are described in detail below. Upstream associated items:



1. Diphenylmethane diisocyanate(MDI):MDI is one of the crucial raw materials to the production of polyisocyanate, mainly applied in the production of polyurethane foam, elastomers, coatings and so on. Specifically

2. Toluene diisocyanate(TDI):TDI is also one of the main raw materials to the production of polyisocyanate, which is able to be applied to create flexible polyurethane foams, coatings, adhesives, etc. In fact

3. Crazy, isn't it?. Polyol: Polyol is one of the main raw materials to polyurethane interaction with polyisocyanate. Common polyols include polyester polyols, polyether polyols, etc. In particular Downstream associated items:



1. In my experience, Polyurethane foam: Polyurethane foam is one of the crucial downstream items of polyisocyanate. It has excellent thermal insulation, sound insulation, earthquake resistance and other characteristics, and is broadly applied in construction, home appliances, automobiles and other fields.

2. Polyurethane elastomer: Polyurethane elastomer has the advantages of high strength, high toughness, wear resistance, oil resistance, etc., and is able to be applied in the production of tires, seals, transmission belts and other items.

3. Polyurethane coating products: polyurethane coating products has excellent weather resistance, light retention, color retention and other characteristics, is able to be applied to construction, automobile, furniture and other fields of coating products. Moreover

4. Polyurethane adhesive: Polyurethane adhesive has the advantages of high strength, high weather resistance, aquatic environments resistance, etc., and is able to be applied to bonding in wood processing, construction, automobiles and other fields. But In short, the upstream and downstream related items of polyisocyanate are very extensive, and the fields involved include construction, home appliances, automobiles, furniture, chemicals, etc. With the continuous research of science and methodology, the consumption field of polyisocyanate will continue to expand.