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
Aromatic polyisocyanate prepolymer based on diphenylmethane diisocyanate (MDI). As a binder for the formulation of moisture-curing, one-component coatings and adhesives. As a hardener for hydroxyl-bearing co-reactants.
Applications
Desmodur® E XP 2723 is suitable for use in the formulation of moisture-curing one-component systems which, when thinned with a suitable solvent, can be used as a primers and sealers for porous substrates to provide protection against moisture, oil, fuel and other chemicals.It can also be used as a binder in the formulation of synthetic resin mortars. In combination with suitable Desmophen® polyols, Desmodur® E XP 2723 yields tough but flexible, wear-resistant coatings and sealers.Desmodur® E XP 2723 is also suitable for use in the formulation of solvent-free moisture-curing one-component adhesives or in combination with Baycoll® to formulate two-component adhesives. These can be used to bond many materials, e.g. wood, metal and plastic.
Form supplied
Solvent-free liquid
Specification
| Property | Test Condition | Value | Unit | Standard |
|---|---|---|---|---|
| NCO | 15,00 - 15,80 | % | MDI-01-01 | |
| Viscosity | 25 °C | 1,200 - 2,000 | mPa*s | MDI-01-02 |
Typical Values
| Property | Test Condition | Value | Unit | Standard |
|---|---|---|---|---|
| Equivalent weight | approx. 270 | |||
| Flash point | approx. 223 | °C | DIN EN ISO 2719 | |
| Density | 20 °C | approx. 1,12 | g/ml | DIN EN ISO 2811-1 |
Solubility / thinnability
In general, Desmodur® E XP 2723 has good compatibility with ethyl acetate, butyl acetate, 1-methoxypropylacetate-2, xylene and Solvesso® 100. However, the solutions formed must be tested for their storage stability.Prolonged storage of a solution with low binder content may result in turbidity and sedimentation. Only PU grade solvents should be used (< 0.05 % water). The solvent should not contain reactive groups.
Compatibility
In general, Desmodur® E XP 2723 is compatible with Desmophen®/Baycoll® polyols, with other Desmodur® products and with flexibilizers.
Storage
- Storage in original sealed Covestro container. - Recommended storage temperature: 10 - 30 °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 at elevated temperatures will lead to an increase in viscosity and a reduction of the NCO content.
Storage time
Covestro represents that, for a period of six 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 six 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 six 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 six 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 .
