Reynolds Smooth-Cast® ONYX® SLOW Ultra-Black Urethane Resins

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Reynolds Smooth-Cast® ONYX® SLOW Ultra-Black Urethane Resins
Categories:	Polymer; Thermoset; Polyurethane, TS; Thermoset Polyurethane, Elastomer, Unreinforced
Material Notes:	Product Overview: Smooth-Cast™ ONYX™ is a mercury-free urethane resin that cures at room temperature to a deep black, solid plastic. ONYX™ resins offer the convenience of a 1A:1B by volume mix ratio and have very low viscosities, so they are easy to mix and pour. ONYX™ resins have an ultimate Shore hardness of 80D and offer higher physical properties and higher heat resistance vs. other general purpose resins. ONYX™ resins are available in 2 speeds. ONYX™ FAST resin has a pot life of 2.5 minutes and a cure time of 10-15 minutes, while ONYX™ SLOW has a pot life of 5 minutes and a cure time of 90 minutes. Advantages that ONYX™ resins offer over other resins; 1) if you desire a black casting, adding color pigment is not necessary, 2) cured plastic is ultra-black and darker than competitive black resins, 3) cured ONYX™ plastic can be polished and buffed to a high gloss shine and 4) ONYX™ offers higher heat resistance vs. competitive black resins, 5) unlike other black resins, ONYX™ does not contain mercury and 6) ONYX™ is less expensive vs. other black resins. Applications include reproducing sculpture, making prototypes and potting / encapsulation. Due to it’s quick cure time and hardness, ONYX™ FAST is a good choice for creating fast cold cast bronze, brass, copper, nickel/silver, etc. effects. Information provided by Reynolds Advanced Materials
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Physical Properties	Original Value	Comments

Specific Gravity	1.09 g/cc	ASTM D-1475
Viscosity	100 cP	Mixed; ASTM D-2393
Linear Mold Shrinkage	0.012 in/in	ASTM D-2566

Mechanical Properties	Original Value	Comments
Hardness, Shore D	80	ASTM D-2240
Tensile Strength, Ultimate	7660 psi	ASTM D-638
Elongation at Break	3.0 %	ASTM D-638
Tensile Modulus	374000 psi	ASTM D-638
Flexural Strength	10230 psi	ASTM D-790
Flexural Modulus	286000 psi	ASTM D-790
Compressive Strength	11400 psi	ASTM D-695
Compressive Modulus	97900 psi	ASTM D-695

Thermal Properties	Original Value	Comments
Heat Distortion Temperature	100 °C	ASTM D-648

Processing Properties	Original Value	Comments
Cure Time	90.0 min	Handling Time
Pot Life	5.00 min	ASTM D-2471

Descriptive Properties
Color	Black
Mix Ratio	120A: 100B	by weight
	1A:1B	by volume
Specific Volume	27.7	[cu. in./lb.]

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