Desmodur CQ 44 M Liquid MB is a monomeric diphenylmethane-4,4'-diisocyanate (MDI).
Desmodur CQ 44 M Liquid MB 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.
Our certified circular Desmodur CQ 44 M Liquid MB has a share of approx. 60% renewable feedstock attributed via the mass balance approach.
- 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.
|NCO content (theoretical)||% by wt.||33.6|
|Density at 40 °C||DIN 51 757||g/cm3||approx. 1.19|
|Freezing point||(2011-0260102-92)||°C||min. 38.4|
|Viscosity at 40 °C||(2011-0313703-95)||mPa*s||4.1|
|Phenyl isocyanate content||(2011-0489801-95)||ppm||max. 10|
|Vapor pressure at 20 °C||hPa||< 10^-5|
|Dimer *Valid only for the time of delivery||MDI-01-08||%||max. 0.1|
|Hydrolysable chlorine||MDI-01-04||mg/kg||max. 50|