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Specialty Compounds RTP Company

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Reynolds PMC® 780 Dry & Wet Industrial Liquid Rubber Compound
Categories: Polymer; Thermoset; Polyurethane, TS; Thermoset Polyurethane, Liquid

Material Notes: Product Overview: PMC-780 is a premium performance urethane rubber that offers exceptional strength, durability and abrasion resistance. PMC-780 DOES NOT CONTAIN MOCA – a known cancer causing agent and hazard. Mixed two parts A to one part B by weight or volume, PMC-780 urethane pours easily and cures at room temperature with negligible shrinkage to a solid Shore 80A rubber. Pick The One Best Suited For Your Application: Original PMC-780 Dry does not exude oil. New PMC-780 Wet contains a built in release agent to aid in demolding concrete. (Note: “wet” rubber has a higher net shrinkage value over time vs. “dry “ rubber.) Both are used around the world for casting abrasive materials such as concrete (pre-cast concrete, making concrete stamping pads, etc.) and gypsum plasters with high exotherms. PMC-780 Dry is also commonly used to make rubber mechanical parts of varying configurations (gaskets, wheels, and pullies) as well as ball mill liners and vibration/shock pads.

Information provided by Reynolds Advanced Materials

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Physical PropertiesOriginal ValueComments
Specific Gravity 1.02 g/ccASTM D-1475
Viscosity 2000 cPMixed; ASTM D-2393
Linear Mold Shrinkage <= 0.0010 in/in
 
Mechanical PropertiesOriginal ValueComments
Hardness, Shore A 80ASTM D-2240
Tensile Strength 900 psiASTM D-412
Elongation at Break 700 %ASTM D-412
100% Modulus 400 psiASTM D-412
Tear Strength 200 pliDie C; ASTM D-624
 
Processing PropertiesOriginal ValueComments
Cure Time 48.0 hour
Pot Life 25.0 minASTM D-2471
 
Descriptive Properties
ColorLight Amber
Mix Ratio2A:1Bby volume
 2A:1Bby weight
Specific Volume27.2[cu. in./lb.]

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PREYN080 / 296781

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