Reynolds PMC® 746 Polyurethane Rubber Compound

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Reynolds PMC® 746 Polyurethane Rubber Compound
Categories:	Polymer; Thermoset; Polyurethane, TS; Thermoset Polyurethane, Elastomer, Unreinforced
Material Notes:	Product Overview: PMC®-746 was developed to make molds for casting gypsum plasters. Like PMC®-744, this product is well suited for use as a rubber case mold – especially large case molds where extra rigidity is required. Shore hardness is 60A. Because of its durability and moisture resistant properties PMC®-746 is also used by zoos and museums for a variety of mold-making, display and exhibit applications. It features a convenient mix ratio (2:1 by weight or volume), and contains no mercury. Other applications include making plaster block molds, reproducing ornamental plaster (architectural restoration), pre-cast concrete molds, casting waxes, Smooth-On rigid polyurethanes and epoxies and also for making a variety of special effects for movies and theatre. Information provided by Reynolds Advanced Materials
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Physical Properties	Original Value	Comments

Specific Gravity	1.03 g/cc	ASTM D-1475
Viscosity	1200 cP	Mixed; ASTM D-2393
Linear Mold Shrinkage	<= 0.0010 in/in

Mechanical Properties	Original Value	Comments
Hardness, Shore A	60	ASTM D-2240
Tensile Strength	700 psi	ASTM D-412
Elongation at Break	650 %	ASTM D-412
100% Modulus	220 psi	ASTM D-412
Tear Strength	100 pli	Die C; ASTM D-624

Processing Properties	Original Value	Comments
Cure Time	16.0 hour
Pot Life	15.0 min	ASTM D-2471

Descriptive Properties
Color	Amber
Mix Ratio	2A:1B	by volume
	2A:1B	by weight
Specific Volume	26.9	[cu. in./lb.]

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