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Specialty Compounds RTP Company

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Reynolds EpoxAcast® 650; Hardener: HT High Temp Mineral filled casting epoxy
Categories: Polymer; Thermoset; Epoxy; Epoxy, Cast, Unreinforced

Material Notes: Product Overview: EpoxAcast™ 650 and EpoxAcast™ 650 BLACK are mineral filled general purpose casting epoxies that are low cost and versatile. They feature a low mixed viscosity for minimal bubble entrapment. Choose Fast, Medium or Slow catalyst to fit your project. You can also use HT Hardener to give your castings higher heat resistance. EpoxAcast™ 650 and EpoxAcast™ 650 BLACK are used for making hard dies for metal stamping as well as patterns and fixtures. They are also used for electrical encapsulation to extend the life cycles and enhance the performance of potted electronic devices. The high compressive strength of EpoxAcast™ 650 and EpoxAcast™ 650 BLACK makes it ideal for making stamping dies for production pressing of metal ornaments.

Information provided by Reynolds Advanced Materials

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Physical PropertiesOriginal ValueComments
Specific Gravity 1.52 g/ccASTM D-1475
Viscosity 5000 cPMixed; ASTM D-2393
Linear Mold Shrinkage 0.0070 in/inASTM D-2566
 
Mechanical PropertiesOriginal ValueComments
Hardness, Barcol 93935; ASTM D-2240
Tensile Strength, Ultimate 6900 psiASTM D-638
Elongation at Break 0.82 %ASTM D-638
Tensile Modulus 1.079e+6 psiASTM D-638
Flexural Strength 10850 psiASTM D-790
Flexural Modulus 775000 psiASTM D-790
Compressive Strength 15980 psiASTM D-695
Compressive Modulus 134400 psiASTM D-695
 
Electrical PropertiesOriginal ValueComments
Volume Resistivity >= 3.59e+15 ohm-cmASTM D257-99
Surface Resistance 5.42e+11 ohmASTM D257-99
Dielectric Constant 5.08
@Frequency 1000 Hz
ASTM D150-98
 5.3
@Frequency 60 Hz
ASTM D150-98
Dielectric Strength 404 V/milASTM D-147-97a
 
Thermal PropertiesOriginal ValueComments
Maximum Service Temperature, Air 86.0 °CDeflection Temp. Post cured per heat post curing schedule; ASTM D-648
 
Processing PropertiesOriginal ValueComments
Cure Time 24.0 hour24 Hours followed by: Heat cure for 2 hrs. at 175°F/80°C, then 3 hrs. at 300°F/150°C.
Pot Life 180 minASTM D-2471
 
Descriptive Properties
ColorBlackEpoxAcast™ 650 BLACK
 Off-WhiteEpoxAcast™ 650
Mix Ratio100A:10Bby weight
Specific Volume18.2[in3/lb], ASTM D-792

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PREYN195 / 296896

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