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Desmodur 44V20 is a liquid, dark brown polymeric isocyanate based on diphenylmethane-4.4'-diisocyanate (MDI) with isomers and homologues of higher functionality. It is used in conjunction with polyols to produce polyurethane.
| Property | Value | Unit of measurement |
Method |
| NCO content | 30.5-32.5 | % by wt. | MDI-01-01 |
| Viscosity 25 °C*) | 160-240 | mP·s | MDI-01-02 |
| Acidity | max.200 | mg/kg | MDI-01-03 |
| *) Lengthy storage can lead to an increase in the viscosity of Desmodur® 44V20 L, although in our experience this has no adverse effect on the processing properties of the product. | |||
| Property | Value | Unit of measurement |
Method |
| Density 20 °C | approx. 1.23 | g/cm* | DIN 51757 |
| Phenylisocyanate content | max.50 | ppm | MDI-01-09 |
| Coefficient of thermal expansion | 6.59.10-4 | K-1 | |
| Specific heat (cp) | approx. 1.51 | kJ/kgK |
Recommended storage temperature: + 10 to + 30 °C (in exceptional cases up to 50°C)
Storage stability (ex works): 6 months if stored in moisture-tight drums
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