Brown liquid, MDI is a polyurethane material synthesized from isocyanate, polyol and its additives. With its excellent performance, wide variety and wide range of uses, it is unique among many synthetic materials and has become one of the fastest growing materials today.
Application：
MDI is 4,4’diphenylmethane diisocyanate (pure MDI), a mixture containing a certain proportion of pure MDI and polyphenyl polymethylene polyisocyanate (polymerized MDI), and modified products of pure MDI and polymerized MDI. General term. , is the most important raw material for the production of polyurethane. In addition to polyurethane, a small amount of MDI is also used in other aspects. Polyurethane has the elasticity of rubber, the strength of plastic and excellent processing properties. In particular, it has advantages that other synthetic materials cannot match in terms of heat insulation, sound insulation, wear resistance, oil resistance, elasticity, etc. The sixth largest plastic after ethylene, polypropylene, polystyrene, and ABS (now surpassing ABS to become the fifth largest plastic), it has been widely used in national defense, aerospace, light industry, chemical industry, petroleum, textiles, transportation, automobiles, Medical and other fields have become indispensable emerging materials for economic development and people’s lives.
Certificate of Analysis:
| Test Item(s) | Specification(s) |
| Appearance | Brown Liquid |
| Viscosity(25℃)/(mPa·s) | 150-250 |
| NCO Content/% | 30.5-32.0 |
| Density (25℃)/(g/cm³) | 1.220-1.250 |
| Acid Content/% | <0.030 |
| Hydrolysable Chlorine/% | <0.20 |
Packing & Storage:
210L iron drums, 250kg/drum
Since MDI PM-200 is a reactive chemical, reaction with atmospheric moisture happens easily and leads to the formation of insoluble ureas and carbon dioxide gas, which can result in pressure build-up in closed containers and viscosity increase of the product. Containers must therefore be absolutely dry and carefully sealed after congested with nitrogen.
Containers of MDI PM-200 should be kept properly closed and stored indoors at ambient temperature (15-35℃) in a well-ventilated area. Storage at low temperature (below 5℃) may lead to some crystallization; this material must, therefore, be protected from frost.
If crystallization does occur, the material should be heated by rolling the drum in a hot air oven at 70-80℃ to melt it out, and should then be thoroughly agitated before use. Melting in a water bath is not recommended.
Extended storage at temperatures above 50℃ is not recommended to prevent from the formation of insoluble solids and viscosity increase.
