Costron Desmodur XP 2840 Aliphatic Isocyanate HDI-Based Curing Agent Based on Hexamethylene Diisocyanate

2023-11-02by admin

Costron Desmodur XP 2840 Aliphatic Isocyanate HDI-Based Curing Agent Based on Hexamethylene Diisocyanate


Fatty group of racial isocyanates based on hexamethylene diisocyanate as a curing agent component for light and weather resistant coating systems

Form of supply 100 %

Characteristic data

Characteristic data Data unit Test method
NCO content approx. 23 % DIN EN ISO 11 909
Viscosity, 23°C approx. 500 mPa-s DIN EN ISO 3219/A.3
Color value (Hazen) < 80 DIN EN 1557
HDI monomer ≤ 0.26 % DIN 55 956

Other data

Characteristics Values Units Test method
Viscosity, 25°C approx. 450 mPa-s DIN EN ISO 3219/A.3
Equivalent approx. 183 g
Flash point 183 °C DIN EN 22 719
Density, 20 °C 1.15 g/cm3 DIN EN ISO 2811


As an exceptionally low viscosity polyisocyanate, Desmodur®XP 2840 is particularly suitable for the preparation of high solids paint formulations for general industrial coatings, automotive refinish, traffic tools and plastic coatings.


Desmodur® XP 2840 can be mixed with most Desmodur® series products such as Desmodur® N 75, N 100, N 3200, N 3300, N 3390, N 3400, N 3600, N 3900, Z 4470, HL and IL. It is generally compatible with hydroxyfunctional polyesters, polyethers (Desmophen® series) and hydroxyacrylate series products. It
It is not compatible with Desmophen® 650 and 651.


This product is compatible with the following solvents:
Ethyl acetate, butyl acetate, propylene glycol methyl ether acetate, acetone, methylethyl ketone, methyl isobutyl ketone, cyclohexanone, toluene, dimethylbenzene, solvent naphtha® 100 and mixtures thereof. Not suitable for use as a solvent for fatty hydrocarbons.

Desmodur® XP 2840 should not be diluted below 40% solids by weight. Prolonged storage of solutions with low base material content can lead to turbidity and sedimentation. The storage stability of the diluted product should be tested on a case-by-case basis.


– Store in original Crestron sealed containers.
– Recommended Storage Temperature: > 0 – 30 °C.
– Protect from moisture, heat, and foreign objects.
General Information: This product is sensitive to humidity, causing increased color and viscosity when stored at higher temperatures.

Storage Time

Crestron declares that, provided that the product has been stored in full compliance with the requirements in the “Storage” section above and has been properly handled, the product will meet the specifications or characteristics values (as appropriate in the circumstances) stated in the “Specifications or Characteristics Values” section above within 9 months from the date of shipment stated on the shipping documents. Value (as applicable).
The fact that a product exceeds the 9-month period does not mean that it no longer complies with the values set forth in the Specifications or Characteristic Values. However, Crestron recommends that products that are older than 9 months from the date of shipment be tested prior to use to verify that they continue to meet the values set forth in the specifications or characteristic values. Cognex makes no commitment and assumes no responsibility or liability for products that are more than 9 months old from the date of shipment and that do not meet the values set forth in the specifications or Characteristic Values.


Product datasheets are valid only when combined with the most current safety datasheet to which they correspond. Any updates to safety-related information-as required by regulation-will be reflected only in the Safety Data Sheet, and copies will be revised and distributed accordingly. For related information, including updated classification and labeling, applications, handling methods, and more safety-related data, please refer to the currently valid Safety Data Sheet.

Additional Information

This product is primarily used as a curing agent for coatings and adhesives. Handling of coatings or adhesives containing activated polyisocyanates and residual monomeric HDI requires appropriate protective measures, see safety data sheet. Therefore, these products may only be used in industrial or commercial applications. They are not suitable for domestic (DIY) applications.


This is an experimental product and we have not yet gained extensive experience with it. Therefore, we make no warranty as to the performance of the product in operation or use.