MDI is a polyurethane material.
MDI (diphenylmethane diisocyanate) is a white or slightly yellow solid at room temperature and melts into a colorless to slightly yellow liquid. This product can be widely used in the manufacture of microcellular elastomers, thermoplastic elastomers, cast elastomers, artificial leather, synthetic leather, adhesives, coatings, sealants, etc. It is a flammable object. If an accidental fire occurs, carbon dioxide, foam or chemical dry powder fire extinguishers can be used to extinguish the fire.
MDI is a polysemous word, including the following meanings: multiple document interface, diphenylmethane diisocyanate, media-related interface, media transmission quality indicator, model-driven integration, pressure metered aerosol device, manual input program control mode etc. Polyurethane materials, synthesized from isocyanate, polyols and their additives, are unique among many synthetic materials due to their excellent performance, wide variety and broad uses, and have become one of the fastest-growing materials today.
Related applications
MDI is a mixture of 4,4 diphenylmethane diisocyanate (pure MDI) and a certain proportion of pure MDI and polyphenyl polymethylene polyisocyanate ( Polymerized MDI) and the general name of modified products of pure MDI and polymerized MDI are the most important raw materials for the production of polyurethane. A small amount of MDI is used in other aspects besides polyurethane. Polyurethane has the elasticity of rubber, the strength and excellent processing properties of plastic.
Especially in terms of heat insulation, sound insulation, wear resistance, oil resistance, elasticity, etc., it has advantages that other synthetic materials cannot match. After polyethylene, polyvinyl chloride, polypropylene, polystyrene and ABS The sixth largest plastic (now surpassing ABS to become the fifth largest plastic) has been widely used in national defense, aerospace, light industry, chemical industry, petroleum, textile, transportation, automobiles, medical and other fields, and has become indispensable for economic development and people's lives. Emerging materials.