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[Chemical Knowledge]：Properties and Uses of MDI

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MDI (diphenylmethane diisocyanate) is an important chemical raw material, which is widely used in polyurethane, rubber, paint and other fields. This article will detail the nature and use of MDI.

1. the properties of MDI

MDI is a colorless or slightly yellow transparent liquid with a strong pungent odor. Its molecular structure contains two isocyanate groups, which makes MDI highly reactive and can react with a variety of compounds to generate the corresponding polyurethane, polyurea, polyamide and other polymer compounds.

MDI has good thermal stability, weather resistance, chemical resistance and electrical insulation, is an excellent chemical raw material.

2. the use of MDI

1. polyurethane field
MDI is an important raw material in the production of polyurethane, and polyol reaction can generate polyurethane foam, widely used in thermal insulation, heat insulation, shock absorption and other fields. In addition, MDI can also be used to produce polyurethane elastomers, polyurethane coatings, polyurethane adhesives, etc.

2.
in the field of rubber MDI can be used as a crosslinking agent for rubber, improve the strength and wear resistance of rubber, and extend the service life of rubber products.

3.
MDI in the field of coatings can be used as raw materials for coatings to improve the weather resistance, chemical resistance and hardness of coatings, and is widely used in the production of coatings in the fields of construction, automobiles, ships, etc.

In conclusion, MDI, as an important chemical raw material, has broad application prospects in the field of chemical production raw materials.

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