Reynolds PMC® 744 Polyurethane Rubber Compounds

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Reynolds PMC® 744 Polyurethane Rubber Compounds
Categories:	Polymer; Thermoset; Polyurethane, TS; Thermoset Polyurethane, Elastomer, Unreinforced
Material Notes:	Product Overview: PMC®-744 has been used for years by mold making professionals to cast plaster, concrete, resins, etc. It is excellent for making molds that are strong, durable and dimensionally stable. Low viscosity ensures fine detail reproduction. PMC®-744 is ideal for making ceramic case molds and plaster block molds, reproducing ornamental plaster, making molds for casting concrete, casting a variety of Smooth-On urethane resins, casting wax for making candles and making a mechanical rubber parts. Information provided by Reynolds Advanced Materials
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Physical Properties	Metric	English	Comments

Specific Gravity	1.01 g/cc	1.01 g/cc	ASTM D-1475
Viscosity	3400 cP	3400 cP	Mixed; ASTM D-2393
Linear Mold Shrinkage	<= 0.0010 cm/cm	<= 0.0010 in/in

Mechanical Properties	Metric	English	Comments
Hardness, Shore A	44	44	ASTM D-2240
Tensile Strength	2.07 MPa	300 psi	ASTM D-412
Elongation at Break	400 %	400 %	ASTM D-412
100% Modulus	0.621 MPa	90.0 psi	ASTM D-412
Tear Strength	15.8 kN/m	90.0 pli	Die C; ASTM D-624

Processing Properties	Metric	English	Comments
Cure Time	960 min	16.0 hour
Pot Life	15.0 min	15.0 min	ASTM D-2471

Descriptive Properties
Color	Beige
Mix Ratio	2A:1B		by volume
	2A:1B		by weight
Specific Volume	27.5		[cu. in./lb.]

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PREYN077 / 296778

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