Desmodur® PF

Desmodur® PF is a modified diphenyl-methane-4,4'-diisocyanate (MDI).

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Product Types

  • MDI


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General Characterization

Desmodur® PF is a modified diphenyl-methane-4,4'-diisocyanate (MDI).
Desmodur® PF is a modified diisocyanate that is liquid at room temperature and is suitable for combination with Baycoll®, Desmophen® and Acclaim® in the formulation of adhesives.

Storage Conditions

- Storage in original sealed Covestro container.

Recommended storage temperature: 20 - 25 °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. Prolonged storage at temperatures above 25 °C results in a deterioration in quality as the product becomes increasingly turbid owing to the formation of a sediment (dimers) that is not readily soluble. For example, storage stability at 40 °C is limited to a maximum of 4 months. Storage at too low temperature results in crystallisation which starts at temperatures below 20 °C.
To prevent crystallisation, it must be ensured that the product does not cool to below 20 °C. The product should be checked for crystallisation on delivery. If crystallisation has occurred during transportation, the prodcut should be returned immediately.


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Packaging Type

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Technical Properties & Datasheets

Property Name Test Method Unit Value
Viscosity 25 °C MDI-01-02 mPa*s 600 ± 100
Hydrolysable chlorine (Cl) MDI-01-04 mg/kg max. 50
NCO MDI-01-01 % 23.0 ± 0.5

Property Name Test Method Unit Value
Density 25 °C DIN 51 757 g/cm3 approx. 1.21
Vapor pressure at 20 °C (MDI) hPa < 10^-5
Solidification temperature °C < 20
Phenyl isocyanate content MDI-01-09 mg/kg max. 10


Technical Data Sheet
Safety Data Sheet
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