Before working with this product, you must read and become familiar with the available information on its risks, proper use, and handling. Information is available in several forms, e.g., in particular in the currently valid safety data sheets and product labels. For further information contact your Covestro representative.
Product description
Applications
Desmodur® VP.PU 10WB21 is a NCO terminated diphenyl methane-4,4'-diisocyanate (MDI) prepolymer for the production of rebonded flexible foams.
Sampling
The access of moisture in any form must be prevented.
Specification
| Property | Test Condition | Value | Unit | Standard |
|---|---|---|---|---|
| Appearance | brownish liquid | DIN ISO 6271 | ||
| NCO content | 25°c | 19,5 to 20,5 | % | MDI-01-01 |
| Density at 20 °C | approx. 1,163 | g/cm3 | DIN 51757 | |
| Viscosity at 25 °C | 900 to 1300 | mPa*s | MDI-01-02 | |
| Acidity | 250 to 400 | ppm | MDI-01-03 |
Storage
Recommended storage temperature (°C): 20 – 40Shelf life (ex works) 6 months if stored in sealed, moisture-tight containersPartially used containers should be tightly resealed due to the hygroscopic nature of the product.Recommended temperature for processing (°C): 20 - 40.
Processing
Desmodur® VP.PU 10WB21 reacts with moisture causing polyurea layers within the mixing tools, which have to be removed mechanically from time to time.The viscosity of the Desmodur® TP.PU 10WB21 might increase depending on storage time and temperature. This viscosity increase does not limit the processability of the product according to our experience.Desmodur® TP.PU 10WB21 can partly crystallize at a temperature below 15 °C. The product can be warmed up for a short period of time to a temperature of approx. 50 °C in order liquefy it again.
Health and Safety Information
Disclaimer
Contact
Please use our contact form or contact us directly by sending an e-mail to technical-datasheets@cx.covestro.com .
