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Mondur® 1566

modified MDI; NCO: approx. 33 Wt. %; Viscosity: approx. 12 mPa·s @ 25°C

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About

Product Types

  • PMDI

Material

No data available

General Characterization

Mondur 1566 is a high monomer, modified MDI containing a high percentage of 2,4’-MDI isomer.

Storage Conditions

Mondur 1566 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 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 20° to 30°C (68° to 86°F). Within this range, lower storage temperatures will maximize the storage life of this product. Mondur 1566 isocyanate must not be allowed to freeze. Exposure to temperatures less than 20°C (68°F), even for short periods of time, can result in the formation of solid material. Appropriate precautions must be taken during shipment and storage.
Prolonged storage of solid or partially solid Mondur 1566 isocyanate may result in the formation of MDI dimer in amounts that exceed its solubility in the prepolymer at normal storage temperatures. This can make the product unusable.
If solids should form because of exposure of Mondur 1566 isocyanate to low temperatures, it may be possible to reliquify the product 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.
The shelf life is six months after receipt of material by customer, when stored in sealed original containers under conditions stated above.

Sampling

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Packaging Type

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Technical Properties & Datasheets

Property Name Test Method Unit Value
Appearance Light yellow toyellow liquid
Freeze Temperature °C approx. 15
Specific gravity at 25°C approx. 1.2
Viscosity at 25°C mPa•s approx. 12

Downloads

Technical Data Sheet
Safety Data Sheet
No direct download available, please visit www.productsafetyfirst.covestro.com
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