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Desmodur® PF

Desmodur PF is a mixture of modified MDI based on diphenylmethane-4,4'-diisocyanate

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About

Product Types

  • MDI

Material

No data available

General Characterization

Desmodur® PF is a colourless to yellow coloured, modified diphenylmethane 4,4' diisocyanate.

Storage Conditions

Recommended storage temperature 20 - 25 °C ( in the liquid state )

Shelf life (ex works ) 6 months if stored in sealed, moisture-tight containers

Storage for long periods at temperatures below +15 °C or above +25 °C leads to a deterioration in quality.

At temperatures below 15 °C crystallisation sets in, encouraging the formation of infusible dimers. This makes it impossible to completely melt the product, even if it has been stored for only three weeks.

Storage at temperatures above 25 °C also accelerates the formation of insoluble sediment (dimers). At 40 °C, for example, the storage stability of the product is reduced to 4 months.

Freshly crystallised Desmodur® PF must be remelted immediately by heating to a maximum temperature of 60 to 70 °C. In doing so, it is important to ensure that the entire contents of the drum are melted and homogenised. The drum should then be kept sealed at the standard storage temperature (20 to 25 °C).

Sampling

Moisture access should be prevented when taking product samples.

Packaging Type

No data available

Technical Properties & Datasheets

Property Name Test Method Unit Value
NCO content MDI-01-01 % by wt. 23.0 ± 0.5
Viscosity 25 °C MDI-01-02 mPa*s 600 ± 100*
Hydrolysable chlorine MDI-01-04 ppm max. 50

Downloads

Technical Data Sheet
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Safety Data Sheet
No direct download available, please visit www.productsafetyfirst.covestro.com
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