Desmodur®N 3900

CAS No.	28182-81-2

Characterization	Low-viscosity,aliphatic polyisocyanate resin based on hexamethylene diisocyanate. As the hardener for weather-stable coating systems.
Specification
Property	Value	Unit of measurement		Method
NCO content	23.5±0.5	%by wt.		M105-ISO 11909
Viscosity at 23℃	730±100	mPa · s		M014-ISO 3219/A.3
Hazen color value	≤40			M017-EN 1557
Monomeric HDI	<0.25	%		M106-ISO 10283
Other data*
Property	Value		Unit of measurement	Method
Equivalent weight	approx.179
Flash point	approx.203		℃	DIN EN 22719
Density	approx.1.15		g/cm³	DIN EN ISO 2811
*These values provide general information and are not part of the product specification.

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