Dow PAPI™ 27 Polymeric MDI

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Dow PAPI™ 27 Polymeric MDI
Categories:	Fluid; Polymer
Material Notes:	PAPI™ 27 polymeric MDI is a polymethylene polyphenylisocyanate that contains MDI. This product has a narrow molecular weight distribution and a high reactivity. Applicable to many foam processes, this product is compatible with rigid polyether and polyester polyols, making it suitable for a full range of low- to high-density semi-rigid foams, rigid foams and structural RIM processing. Information provided by Dow
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Physical Properties	Metric	English	Comments

Density	1.23 g/cc	0.0444 lb/in³
Viscosity	150 - 220 cP	150 - 220 cP
Viscosity Measurement	5.0 - 10	5.0 - 10	[cps/mo.] Viscosity growth
Molecular Weight	340 g/mol	340 g/mol
Vapor Pressure	<= 1.30e-8 bar	<= 0.00000975 torr

Chemical Properties	Metric	English	Comments
Acid Value	0.017	0.017	HCl content, %

Thermal Properties	Metric	English	Comments
CTE, linear	1170 µm/m-°C @Temperature 20.0 °C	650 µin/in-°F @Temperature 68.0 °F
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	>= 400 °F	ASTM D93 Closed Cup

Descriptive Properties
NCO Content %	31.4

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PDOW1398 / 30616

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