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About
Product Types
- MDI
- MMDI
- Aromatic polyisocyanate
- Isocyanate
- Reactive system
Material
- Adhesives
- Solvent-free
General Characterization
Desmodur® 44 MC Liquid is a monomeric diphenylmethane-4,4'-diisocyanate (MDI).
Desmodur® 44 MC Liquid is a monomeric diisocyanate that is solid at room temperature and liquid above around 40 °C. It is suitable for combination with Baycoll®, Desmophen® and Acclaim® in the formulation of adhesives and polyurethane coating resins.
Desmodur® 44 MC Liquid is a monomeric diisocyanate that is solid at room temperature and liquid above around 40 °C. It is suitable for combination with Baycoll®, Desmophen® and Acclaim® in the formulation of adhesives and polyurethane coating resins.
Storage Conditions
- Storage in original sealed Covestro container.
- Recommended storage temperature: 41 - 45 °C.
- Protect from moisture, heat and foreign material.
General information: The product is sensitive to moisture. Like all isocyanates, it reacts with water to form insoluble urea derivatives and carbon dioxide. In closed containers, the formation of carbon dioxide can results in a dangerous build-up of pressure. Contact with air, especially coupled with exposure to light, accelerates the yellowing of the product. Liquid product should therefore be padded with dry nitrogen. Generally speaking, the processing properties are not affected by yellowing. As a result of dimerization (formation of uretdione), the product is sensitive to heat. The solid product dimerizes more quickly at room temperature than the liquid product stored at 42 °C. Therefore, solid product should be stored at temperatures below 5 °C and melted quickly and carefully. Although dimerization declines with decreasing temperature, the storage stability is also limited at 5 °C. Handling instructions, safety data, information about the transport of bulk liquids and customer tank farms and proposals for melting units can be supplied on request.
- Recommended storage temperature: 41 - 45 °C.
- Protect from moisture, heat and foreign material.
General information: The product is sensitive to moisture. Like all isocyanates, it reacts with water to form insoluble urea derivatives and carbon dioxide. In closed containers, the formation of carbon dioxide can results in a dangerous build-up of pressure. Contact with air, especially coupled with exposure to light, accelerates the yellowing of the product. Liquid product should therefore be padded with dry nitrogen. Generally speaking, the processing properties are not affected by yellowing. As a result of dimerization (formation of uretdione), the product is sensitive to heat. The solid product dimerizes more quickly at room temperature than the liquid product stored at 42 °C. Therefore, solid product should be stored at temperatures below 5 °C and melted quickly and carefully. Although dimerization declines with decreasing temperature, the storage stability is also limited at 5 °C. Handling instructions, safety data, information about the transport of bulk liquids and customer tank farms and proposals for melting units can be supplied on request.
Sampling
No data available
Packaging Type
No data available
Technical Properties & Datasheets
| Property Name | Test Method | Unit | Value |
|---|---|---|---|
| Dimer *Valid only for the time of delivery | MDI-01-08 | % | max. 0.1 |
| 2,4'-MDI | MDI-01-06 | % | max. 1.8 |
| Hydrolysable chlorine | MDI-01-04 | mg/kg | 50 ± 10 |
| 4,4'-MDI | MDI-01-06 | % | min. 98.2 |
| Property Name | Test Method | Unit | Value |
|---|---|---|---|
| Density at 40 °C | DIN 51 757 | g/cm3 | approx. 1.19 |
| Freezing point | (2011-0260102-92) | °C | min. 38.4 |
| NCO content (theoretical) | % by wt. | 33.6 | |
| Vapor pressure at 20 °C | hPa | -5 | |
| Viscosity at 40 °C | (2011-0313703-95) | mPa*s | 4.1 |
| Phenyl isocyanate content | (2011-0489801-95) | ppm | max. 10 |
Downloads
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Technical Data Sheet
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Safety Data SheetNo direct download available, please visit www.productsafetyfirst.covestro.com