Mondur® MA 2300

allophanate-modified 4,4' MDI; NCO: approx. 23 Wt. %; Viscosity: approx. 500 mPa·s @ 25°C

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Product Types

  • MMDI


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General Characterization

Mondur MA 2300 is an allophanate modified 4,4’-diphenylmethane diisocyanate (MDI).

Storage Conditions

Mondur MA 2300 diisocyanate 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 ureas and carbon dioxide gas, which may cause sealed containers to expand and rupture. Partially filled containers should be blanketed with dry nitrogen. Storage temperatures should be maintained between 10° to 30°C (50° to 86°F). Within this range, a storage temperature above 20°C (68°F) will maximize the storage life of this product.
Mondur MA 2300 diisocyanate must not be allowed to freeze. Exposure to temperatures less than 0°C (32°F), even for short periods of time, can result in the formation of solid material. During the winter months, appropriate precautions must be taken during shipment and storage. Prolonged storage of solid or partially solid Mondur MA 2300 diisocyanate may result in the formation of MDI dimer in amounts which exceed its solubility in the product at normal storage temepratures. This can make the product unusable. If solids should form because of exposure to low temperatures, it may be possible to reliquify Mondur MA 2300 by heating. Use a well-ventilated oven for the minimum time necessary to render it clear. The temperature of the product should not exceed 60°C (140°F). Agitation or drum rollers are recommended to avoid excessive local heating, which will degrade the product.
Significant amounts of MDI dimer may form during the heating process. As a result, the remelted diisocyanate may be cloudy, and the processing behavior and/or properties of the final product may be affected. Mondur allophanate modified diisocyanates may show a noticeable color increase during the shelf-life of the product. This is normal behavior for this material and this changes should not impact overall product performance. Following the recommended storag ... text to long! (max 2000 characters)


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Packaging Type

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Technical Properties & Datasheets


Property Name Test Method Unit Value
Functionality 2.0
Equivalent weight avg. 180
Specific gravity at 25°C 1.2
Flash point PMCC °C 93
Viscosity at 25°C mPa•s 500
Appearance Light yellow to yellow liquid
Equivalent weight avg. 180


Technical Data Sheet
Safety Data Sheet
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