type |
Aromatic polyisocyanate prepolymers based on diphenylmethane diisocyanate (MDI) |
form of supply |
Solvent-free liquid |
use |
A. As a binder for the preparation of moisture-curing one-component coatings and adhesives |
Specifications
characteristic |
Numerical value |
Units of measurement |
method |
NCO content |
15.4±0.4 |
% |
DIN EN ISO11909 |
Viscosity, 23°C |
1800±250 |
mPa·s |
DIN EN ISO3219/A.3 |
Other data*
characteristic |
Numerical value |
Units of measurement |
method |
equivalent |
266-280 |
|
|
Flash point |
>193 |
°C |
DIN EN ISO 2719 |
Density@20℃ |
约1.13 |
g/cm3 |
DIN EN ISO 2811-1 |
*This data is general information and is not part of the product specification.
Solubility / dilution
In general, Desmodur® E23 is compatible with ethyl acetate, butyl acetate, propylene glycol methyl ether acetate, xylene, Shellsol® A and Solvesso® 100. However, the storage stability of its diluted solutions must be tested. Long-term storage of low solids solutions may cause turbidity and precipitation. Urethane grade solvents (less than 0.05% water content) should be used and should not contain reactive groups in the solvent.
compatibility
Generally, Desmodur® E23 is compatible with Desmophen®/Baycoll® polyols and other Desmodur® products and tougheners.
application
Desmodur® E23 is suitable for the preparation of moisture-curing one-component coatings, and can be used as a primer and sealer for porous substrates when diluted with suitable thinners, protecting substrates from moisture, oil, gasoline and other chemicals. The product can also be used as a resin for the preparation of synthetic resin mortar. Anti-corrosion coatings based on Desmodur® E23 have excellent properties and are widely used in steel structure materials for civil construction and water conservancy projects. When mixed with the appropriate Desmophen® polyols, this product produces tough, hardwearing coatings and sealers. Desmodur® E21 is also suitable for the preparation of solvent-free moisture-curing one-component adhesives, or mixed with Baycoll® to prepare two-component adhesives. These two adhesives can be used to bond a variety of materials such as wood, metal and plastic.
store
This product is sensitive to moisture and should be stored in the original airtight container. High temperature storage results in increased viscosity and reduced NCO content. This product has a shelf life of at least 6 months when stored under proper conditions.
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