Reynolds TASK® 18 (C-1508) Rigid Urethane Casting Compound

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Reynolds TASK® 18 (C-1508) Rigid Urethane Casting Compound
Categories:	Polymer; Thermoset; Polyurethane, TS; Thermoset Polyurethane, Elastomer, Unreinforced
Material Notes:	Product Overview: TASK™ 18 is a relatively low viscosity aluminum filled urethane casting resin that was developed specifically for making short run vacuum forming molds. When Parts A and B are mixed in proper proportion, TASK™ 18 cures overnight at room temperature with negligible shrinkage to a very hard plastic that has a very high compressive and flexural strength. Cured TASK™ 18 can be polished, machined, drilled, painted, etc. TASK™ 18 is also used to make industrial production parts, prototype parts and tracing patterns. Information provided by Reynolds Advanced Materials
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Physical Properties	Original Value	Comments

Specific Gravity	1.57 g/cc	ASTM D-1475
Viscosity	4400 cP	Mixed; ASTM D-2393
Linear Mold Shrinkage	0.00060 in/in	ASTM D-2566

Mechanical Properties	Original Value	Comments
Hardness, Shore D	88	ASTM D-2240
Tensile Strength, Ultimate	3250 psi	ASTM D-638
Elongation at Break	1.0 %	ASTM D-638
Tensile Modulus	514000 psi	ASTM D-638
Flexural Strength	10700 psi	ASTM D-790
Flexural Modulus	86000 psi	ASTM D-790
Compressive Strength	8420 psi	ASTM D-695
Compressive Modulus	97300 psi	ASTM D-695

Thermal Properties	Original Value	Comments
Heat Distortion Temperature	65.0 °C	ASTM D-648

Processing Properties	Original Value	Comments
Cure Time	16.0 hour	Handling Time
Pot Life	20.0 min	ASTM D-2471

Descriptive Properties
Color	Metal Gray
Mix Ratio	26A:100B	by weight
Specific Volume	17.6	[cu. in./lb.]

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