Dow PAPI™ 580 N Polymeric MDI

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Dow PAPI™ 580 N Polymeric MDI
Categories:	Fluid; Polymer
Material Notes:	PAPI™ 580 N polymeric MDI is a polymethylene polyphenylisocyanate that contains MDI. This product has high functionality (value of 3.0) and relatively high viscosity. Recommended for use in polyisocyanurate rigid foams, this product imparts good resistance to heat distortion, excellent strength properties at low densities and improved humid age stability. Information provided by Dow
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Physical Properties	Metric	English	Comments

Density	1.24 g/cc	0.0448 lb/in³
Viscosity	700 cP	700 cP
Molecular Weight	375 g/mol	375 g/mol
Vapor Pressure	<= 1.33e-8 bar	<= 0.0000100 torr
Storage Temperature	24.0 - 41.0 °C	75.2 - 106 °F

Chemical Properties	Metric	English	Comments
Acid Value	0.040	0.040	% as HCl

Thermal Properties	Metric	English	Comments
CTE, linear	645 µm/m-°C @Temperature 20.0 °C	358 µin/in-°F @Temperature 68.0 °F	volumetric
Specific Heat Capacity	1.80 J/g-°C	0.430 BTU/lb-°F
Thermal Conductivity	0.126 W/m-K	0.870 BTU-in/hr-ft²-°F
Boiling Point	330 °C	626 °F
Decomposition Temperature	230 °C	446 °F
Flash Point	>= 204 °C	>= 399 °F	Closed Cup; ASTM D93

Descriptive Properties
Isocyanate Equivalent Weight	136.5
NCO Content wt%	30.8

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PDOW1402 / 30620

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