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	Original Value	Comments

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

Mechanical Properties	Original Value	Comments
Hardness, Shore D	79 - 89	ASTM D-2240
Tensile Strength	11500 psi	ASTM D-638
Elongation at Break	7.0 %	ASTM D-638
Modulus of Elasticity	409 ksi	ASTM D-638
Flexural Strength	14300 psi	ASTM D-790
Flexural Modulus	414 ksi	ASTM D-790
Izod Impact, Notched	1.50 ft-lb/in	ASTM D-256
Izod Impact, Unnotched	>= 2.00 ft-lb/in	ASTM D-256

Thermal Properties	Original Value	Comments
Deflection Temperature at 0.46 MPa (66 psi)	90.0 °C	ASTM D-648
Deflection Temperature at 1.8 MPa (264 psi)	81.0 °C	ASTM D-648

Processing Properties	Original Value	Comments
Cure Time	6.00 - 8.00 hour @Thickness 3.17 mm	Demold
Gel Time	15.0 min @Load 0.100 kg	ASTM D-2971

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

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PHAPCO172 / 317231

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