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[Chemical Knowledge]：What are the upstream raw materials for toluene diisocyanate? What are the downstream products?

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Toluene diisocyanate (TDI) is an important organic chemical raw material, which is widely used in polyurethane, elastomers, coatings, adhesives and other fields. In the field of chemical production raw materials, there are many upstream and downstream related products of toluene diisocyanate, and the main upstream and downstream products will be described in detail below.

upstream products:

1. toluene: toluene is the main raw material for the production of toluene diisocyanate, obtained by phosgenation reaction.

2. phosgene: phosgene is an important intermediate in the production process of toluene diisocyanate, prepared by the reaction of carbon monoxide and chlorine.

Downstream Products:

1. Polyurethane Foam: Polyurethane foam can be prepared by the reaction of toluene diisocyanate and polyols, which is widely used in furniture, construction, refrigeration, packaging and other fields.

2. polyurethane elastomer: toluene diisocyanate and oligomer polyol reaction can be made of polyurethane elastomer, used in the manufacture of soles, seals, belts and other products.

3. coatings: toluene diisocyanate can be used as a curing agent in coatings, mixed with resins, pigments, etc. to make a variety of coatings for metal, wood, plastic and other materials surface coating.

4. Adhesive: Toluene diisocyanate can be used as a curing agent in adhesives for the manufacture of various adhesives, such as two-component polyurethane adhesives, sealants, etc.

In short, toluene diisocyanate has an important position in the field of chemical production raw materials, and its upstream and downstream related products are extensive, which plays an important role in promoting the development of related industries.

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