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 D 5378 is a mixture of diisocyanates with polymeric constituents for the production of polyurethane flexible foams.
Sampling
Exposure to moisture must be prevented when taking product samples.
Specification
| Property | Test Condition | Value | Unit | Standard |
|---|---|---|---|---|
| Density at 23 °C | approx. 1,22 | g/cm3 | LPUR-050 | |
| NCO-content | 29 ± 0,3 | % by wt. | MDI-01-01 | |
| Viscosity at 23 °C | 170 ± 130 | mPa*s | MDI-01-02 |
Storage
Recommended storage temperature: 18 - 25ºC.Storage stability (exworks): 6 months if stored in closed containers, protected from humidity and sunlight.
Processing
DESMODUR® D 5378 may undergo partial crystallization at temperatures below 0 °C. The product can, however, be brought back into the liquid state by heating the entire contents of the drum for a short time to a maximum of 70 °C, although this may lead to an increase in the solids content. Drums including empty ones should always be kept tightly sealed. The product should never be allowed to come into contact with water, which reacts with DESMODUR® D 5378 to form polyureas and carbon dioxide. Contact with water in any form (damp drums, solvents containing water, moist air) must be prevented not only during storage, but also when removing material from drums and during processing. Failure to do so may lead to a dangerous build up of pressure in tanks and drums due to the generation of carbon dioxide. In addition, polyureas forming in DESMODUR® D 5378 can cause solids to separate out, leading to blockages in the filters, pumps and pipelines of the processing equipment and resulting in production problems.
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 .
