Mondur® MRS 4

2,4’ rich polymeric MDI; NCO: approx. 32.2 Wt. %; Viscosity: approx. 40 mPa·s @ 25°C

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Product Types

  • PMDI


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General Characterization

Mondur MRS 4 is a low to medium functionality polymeric diphenylmethane-diisocyanate (pMDI) with a moderately high 2,4’-MDI isomer content.

Storage Conditions

Mondur MRS 4 isocyanate must be stored in tightly closed containers and protected from contamination with moisture and foreign materials, which can adversely affect processing. It will react slowly with water to form polyureas and liberate carbon dioxide gas, which may cause sealed containers to expand and rupture. Recommended storage temperatures are 10° to 30°C (50° to 86°F). The shelf life is six months after receipt of product by customer, when stored in closed original containers and stored under the recommended conditions.


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Packaging Type

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Technical Properties & Datasheets


Property Name Test Method Unit Value
Density at 25°C lb/gal 10.3
Equivalent weight avg. 129
Flash point PMCC °C 233.8
Appearance Brown/grey liquid
Specific gravity at 25°C 1.24


Technical Data Sheet
Safety Data Sheet
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