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[Chemical Knowledge]：Properties and Uses of Pure MDI (Diphenylmethane Diisocyanate)

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Pure MDI (diphenylmethane diisocyanate) is an important raw material for chemical production, which is widely used in polyurethane, rubber, coatings and other fields. This article will detail the properties and uses of pure MDI.

1. the properties of pure MDI

pure MDI is a colorless or slightly yellow transparent liquid with a strong pungent odor. Its chemical properties are very active and can react with a variety of compounds, including alcohols, amines, water and so on. Pure MDI has a high viscosity and therefore requires heating to reduce the viscosity during storage and use. In addition, pure MDI also has high toxicity, which requires strict control of its use and storage conditions.

2. the use of pure MDI

1.
in the field of polyurethane pure MDI is one of the important raw materials for polyurethane synthesis, can be used in the production of polyurethane foam, elastomers, adhesives and so on. In the field of polyurethane foam, the foam produced by the reaction of pure MDI and polyol has excellent thermal insulation and mechanical properties, and is widely used in construction, home appliances, automobiles and other fields. In the field of polyurethane elastomers, pure MDI can be used to produce elastomer materials with high strength and high wear resistance, which are used in mines, oil fields, machinery and other fields.

2.
in the field of rubber Pure MDI can be used as a modifier for rubber to improve the wear resistance, aging resistance and oil resistance of rubber. In the tire industry, pure MDI can be used to produce high-performance radial tires to increase the mileage and service life of the tires.

3.
in the field of coatings, pure MDI can be used as one of the raw materials of coatings to improve the weather resistance, anti-ultraviolet and chemical corrosion properties of coatings. In architectural coatings, pure MDI can improve the adhesion and durability of coatings and extend the service life of coatings.

4.
in other fields In addition to the above fields, pure MDI can also be used in the production of fibers, sealants, adhesives and other chemical products, widely used in aviation, aerospace, military and other fields.

In short, as an important raw material for chemical production, pure MDI has been widely used in polyurethane, rubber, coatings and other fields, and has played an important role in improving product performance and quality. In the process of using pure MDI, it is necessary to pay attention to its toxicity and safety issues, and take strict measures for storage and use to ensure production safety and personnel health.

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