Dow ISONATE™ 240 MDI Prepolymer

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Dow ISONATE™ 240 MDI Prepolymer
Categories:	Fluid
Material Notes:	ISONATE™ 240 MDI prepolymer is a modified MDI compound produced by reacting high-purity diphenylmethane diisocyanate with a high molecular weight polyester polyol, resulting in a material with good storage stability down to 72°F. This medium-viscosity product may be formulated with conventional polyether or polyester polyols and short chain diols or triols to yield high physical property elastomers or microcellular foams via the cast, low pressure or RIM-dispensing processes. Information provided by Dow
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Physical Properties	Metric	English	Comments

Density	1.22 g/cc	0.0441 lb/in³
Viscosity	1500 cP	1500 cP
Vapor Pressure	<= 1.33e-8 bar	<= 0.0000100 torr

Chemical Properties	Metric	English	Comments
Acid Value	0.020	0.020	% as HCl

Thermal Properties	Metric	English	Comments
Heat of Vaporization	360 J/g	155 BTU/lb
CTE, linear	737 µm/m-°C @Temperature 20.0 °C	409 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	314 °C	597 °F
Decomposition Temperature	230 °C	446 °F
Flash Point	>= 177 °C	>= 351 °F	Closed Cup; ASTM D93

Descriptive Properties
Hydrolyzable Chloride ppm	50
Isocyanate Equivalent Weight	225
NCO Content wt%	18.7

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

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PDOW1387 / 30605

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