- Adhesives
- Coatings, paints & inks
Desmodur® E 21
Aromatic polyisocyanate prepolymer based on diphenylmethane diisocyanate (MDI).
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About
Product Types
- PIC
- MDI
- Prepolymer
- Crosslinkers
- Polyisocyanate
- Hardeners
- Isocyanate
- Reactive system
Material
- Adhesives
- Moisture resistant, Fast bonding, Solvent-free
- Coatings, paints & inks
- Solvent-free, Hard
General Characterization
Desmodur E 21 is an aromatic polyisocyanate prepolymer based on diphenylmethane diisocyanate (MDI).
This product is suitable 1.) as a binder for the formulation of moisture-curing, one-component coatings and adhesives and 2.) as a hardener for hydroxyl-bearing co-reactants.
This product is suitable 1.) as a binder for the formulation of moisture-curing, one-component coatings and adhesives and 2.) as a hardener for hydroxyl-bearing co-reactants.
Storage Conditions
Desmodur E 21 should be stored in tightly sealed original containers and protected from moisture, heat, and foreign materials. The product is sensitive to moisture and should therefore be stored in its sealed original containers. Storage at high temperatures will lead to an increase in viscosity and a reduction of the NCO content. Recommended storage temperature is room temperature (approximately 23ºC).
Sampling
No data available
Packaging Type
No data available
Technical Properties & Datasheets
Characteristics
| Property Name | Test Method | Unit | Value |
|---|---|---|---|
| Equivalent weight | 251 - 274 | ||
| Density at 20^oC | g/ml | approx. 1.15 | |
| Flash point | °C | > 250 |
Specifications
| Property Name | Test Method | Unit | Value |
|---|---|---|---|
| Viscosity at 25°C | mPa∙s | 5,400 ± 1,300 | |
| NCO content | % | 16.0 ± 0.7 |
Downloads
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Technical Data Sheet
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Safety Data SheetNo direct download available, please visit www.productsafetyfirst.covestro.com
