Reynolds EpoxAcast® 670 HT; Hardener: HT High Temp Epoxy casting compound

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Reynolds EpoxAcast® 670 HT; Hardener: HT High Temp Epoxy casting compound
Categories:	Polymer; Thermoset; Epoxy; Epoxy, Cast, Unreinforced
Material Notes:	Product Overview: EpoxAcast™ 670 HT (formerly 20-136) is an epoxy casting compound which offers high heat resistance up to 350° F/177° C if post cure schedule is used. EpoxAcast™ 670 HT features a relatively low viscosity that ensures minimal bubble entrapment. EpoxAcast™ 670 HT also offers an extra long working time of 3 hours. Castings cure with negligible shrinkage and are very hard, very strong and heat resistant. EpoxAcast™ 670 HT is ideal for making vacuum form molds, foundry patterns, forming dies & fixtures, hard rollers, industrial parts and high impact tools. EpoxAcast™ 670 HT is also suitable for encapsulation applications or for use as a high temperature epoxy for bonding a variety of surfaces. Information provided by Reynolds Advanced Materials
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Physical Properties	Original Value	Comments

Specific Gravity	1.15 g/cc	ASTM D-1475
Viscosity	6000 cP	Mixed; ASTM D-2393
Linear Mold Shrinkage	0.0020 in/in	ASTM D-2566

Mechanical Properties	Original Value	Comments
Hardness, Shore D	90	ASTM D-2240
Tensile Strength, Ultimate	4500 psi	ASTM D-638
Elongation at Break	0.65 %	ASTM D-638
Tensile Modulus	332000 psi	ASTM D-638
Flexural Strength	11000 psi	ASTM D-790
Flexural Modulus	254000 psi	ASTM D-790
Compressive Strength	13000 psi	ASTM D-695
Compressive Modulus	101400 psi	ASTM D-695

Electrical Properties	Original Value	Comments
Volume Resistivity	>= 3.59e+15 ohm-cm	ASTM D257-99
Surface Resistance	5.42e+11 ohm	ASTM D257-99
Dielectric Constant	5.08 @Frequency 1000 Hz	ASTM D150-98
	5.3 @Frequency 60 Hz	ASTM D150-98
Dielectric Strength	404 V/mil	ASTM D-147-97a

Thermal Properties	Original Value	Comments
Maximum Service Temperature, Air	122 °C	Heat Deflection Temperature; ASTM D-648
	177 °C	Deflection Temp. Post cured per heat post curing schedule; ASTM D-648

Processing Properties	Original Value	Comments
Cure Time	24.0 hour	24 Hours followed by: Heat cure for 2 hrs. at 175°F/80°C, then 3 hrs. at 300°F/150°C.
Pot Life	180 min	ASTM D-2471

Descriptive Properties
Color	Beige
Mix Ratio	100A:16B	by weight
Specific Volume	20.5	[in3/lb], ASTM D-792

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PREYN200 / 296901

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