Hapco TUFFALLOY 4270 High Strength Urethane

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Hapco TUFFALLOY 4270 High Strength Urethane
Categories:	Polymer; Thermoset; Polyurethane, TS
Material Notes:	TUFFALLOY 4270 is a series of Liquid Molding Compounds with thermoplastic properties such as high impact, high heat distortion, and low viscosity. This unique chemistry developed by Hapco to meet today’s market demands for prototype and low production parts needs. KEY ADVANTAGES: Fast Cycle Time Excellent Physical Properties Low Viscosity 1:1 Mix Ratio TUFFALLOY 4270 Series is available in two speeds. Information provided by Hapco, Inc.
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Physical Properties	Metric	English	Comments

Specific Gravity	1.13 g/cc	1.13 g/cc	ASTM D-4669
Viscosity	250 - 350 cP	250 - 350 cP	ASTM D-4878
Linear Mold Shrinkage	0.00050 - 0.0030 cm/cm	0.00050 - 0.0030 in/in	ASTM D-2566

Mechanical Properties	Metric	English	Comments
Hardness, Shore D	79 - 89	79 - 89	ASTM D-2240
Tensile Strength	79.3 MPa	11500 psi	ASTM D-638
Elongation at Break	7.0 %	7.0 %	ASTM D-638
Modulus of Elasticity	2.82 GPa	409 ksi	ASTM D-638
Flexural Strength	98.6 MPa	14300 psi	ASTM D-790
Flexural Modulus	2.85 GPa	414 ksi	ASTM D-790
Izod Impact, Notched	0.801 J/cm	1.50 ft-lb/in	ASTM D-256
Izod Impact, Unnotched	>= 1.07 J/cm	>= 2.00 ft-lb/in	ASTM D-256

Thermal Properties	Metric	English	Comments
Deflection Temperature at 0.46 MPa (66 psi)	90.0 °C	194 °F	ASTM D-648
Deflection Temperature at 1.8 MPa (264 psi)	81.0 °C	178 °F	ASTM D-648

Processing Properties	Metric	English	Comments
Cure Time	360 - 480 min @Thickness 3.17 mm	6.00 - 8.00 hour @Thickness 0.125 in	Demold
Gel Time	15.0 min @Load 0.100 kg	15.0 min @Load 0.221 lb	ASTM D-2971

Descriptive Properties
Color (cured)	Translucent light brown
Mix Ratio	100:100		Volume
	100:88		Weight

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.

PHAPCO172 / 317231

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