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Specialty Compounds RTP Company

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Reynolds TASK® 4 Urethane Casting Compound
Categories: Polymer; Thermoset; Polyurethane, TS; Thermoset Polyurethane, Elastomer, Unreinforced

Material Notes: Product Overview: TASK™ 4 is a unique polyurethane casting resin that is very strong when cast in Ultra-Thin sections ranging from 0.03” to 0.50”(0.075cm to 1.27cm). TASK™ 4 has a very low mixed viscosity, ensuring flawless pick-up of even the finest detail. Cured plastic exhibits very low shrinkage which is why this plastic has become a favorite of prototype and design professionals throughout the world. Pot life is 20 minutes and cure time is 16 hours at 73°F/23°C. Vibrant colors and color effects are possible by adding SO-Strong™ color tints. Fully cured models made from TASK™ 4 are tough, durable, machinable and paintable. They resist moisture and mild solvents. Applications for TASK™ 4 include making prototype and architectural models, model toys, durable miniatures, ultra-thin mechanical parts and special effect props.

Information provided by Reynolds Advanced Materials

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Physical PropertiesOriginal ValueComments
Specific Gravity 1.167 g/ccASTM D-1475
Viscosity 250 cPMixed; ASTM D-2393
Linear Mold Shrinkage 0.0035 in/inASTM D-2566
 
Mechanical PropertiesOriginal ValueComments
Hardness, Shore D 83ASTM D-2240
Tensile Strength, Ultimate 6500 psiASTM D-638
Elongation at Break 4.0 %ASTM D-638
Tensile Modulus 130000 psiASTM D-638
Flexural Strength 9000 psiASTM D-790
Flexural Modulus 204000 psiASTM D-790
Compressive Strength 7400 psiASTM D-695
Compressive Modulus 75000 psiASTM D-695
 
Thermal PropertiesOriginal ValueComments
Heat Distortion Temperature 45.0 °CASTM D-648
 
Processing PropertiesOriginal ValueComments
Cure Time 16.0 hourHandling Time
Pot Life 20.0 minASTM D-2471
 
Descriptive Properties
ColorIvory
Mix Ratio115A:100Bby weight
Specific Volume23.9[cu. in./lb.]

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PREYN031 / 296732

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