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
Desmophen® V 657 is a trifunctional reactive polyether polyol for the production of polyurethane products.
Form supplied
Colorless to yellowish, low-viscosity liquid.
Specification
| Property | Test Condition | Value | Unit | Standard |
|---|---|---|---|---|
| Hydroxyl number | 255 ± 15 | mg KOH/g | PET-11-01 | |
| Water content | max. 0,150 | % | PET-19-01 | |
| Viscosity at 25°C | 265 ± 20 | mPa∙s | PET-10-01 | |
| Acidity | max 0,350 | mg KOH/g | PET-11-01 |
Typical Values
| Property | Test Condition | Value | Unit | Standard |
|---|---|---|---|---|
| Density at 20 °C | approx. 1,12 | g/cm3 | DIN 51757 | |
| Color | colourless to yellowish | |||
| Hydroxyl content | 7,7 ± 0,5 | % | ||
| Equivalent weight | approx. 220 | g/mol |
Storage
- Storage in original sealed Covestro container. - Recommended storage temperature: 20 - 40 °C. - Protect from moisture, heat and foreign material. General information: The product is sensitive to moisture and should therefore be stored in its sealed original containers.
Storage time
Covestro represents that, for a period of twelve months following the day of shipment as stated in the respective transport documents, the product will meet the specifications or values set forth in section "specifications or characteristic data" above, what ever is applicable, provided that the product is stored in full compliance with the storage conditions set forth in and referenced under section "storage" above and is otherwise handled appropriately. The lapse of the twelve months period does not necessarily mean that the product no longer meets specifications or the set values. However, prior to using said product, Covestro recommends to test such a product if it still meets the specifications or the set values. Covestro does not make any representation regarding the product after the lapse of the twelve months period and Covestro shall not be responsible or liable in any way for the product failing to meet specifications or the set values after the lapse of the twelve months period.
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 .
