These are somewhat harder PU-rubbers that are traditionally used in the ceramic industry
Technical bulletin PMC 744
Technical bulletin PMC 746
Technical bulletin PMC 770
Technical bulletin PMC 780
Technical bulletin PMC 790
|PMC||A:B mixing ratio||Demold Time||Elongation at Break||Mixed Viscosity||Pot Life||Shore A Hardness||Tear Strength||Specific Gravity kg/lt|
|770||2:1 by weight||16 hrs||600%||3000 cps||35 min||70 A||160 pli||1,015|
|780||2:1 weight / volume||48 hrs||700%||2000 cps||25 min||80 A||200 pli||1,015|
|790||2:1 weight / volume||48 hrs||600%||3000 cps||20 min||90 A||300 pli||1,068|
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 and making a variety of mechanical rubber parts.
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 60 A.
- 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 theatres.
PMC®-770 is mixed two parts A to one part B by weight, PMC®-770 pours easily and cures at room temperature to a solid Shore 70A rubber that has exceptional performance characteristics and dimensional stability. It is suitable for production casting of abrasive materials such as concrete (pre-cast concrete, making concrete stamping pads, etc.) and gypsum plasters with high exotherms. It is also suitable for rubber mechanical parts of varying configurations (gaskets, wheels, pulleys) as well as ball mill liners and vibration/shock pads.
PMC®-770 - Shore 70A hardness
PMC®-780 Urethane Rubber - PMC®-780 is a premium performance urethane rubber that offers exceptional strength, durability and abrasion resistance. Mixed two parts A to one part B by volume or weight, PMC®-780 pours easily and cures at room temperature with negligible shrinkage.Pick The One Best Suited For Your Application: Original PMC®-780 Dry does not exude an oil. PMC-780 Wet contains a built-in release agent to aid in demolding concrete. 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, pulleys) as well as ball mill liners and vibration/shock pads.
PMC®-780 DRY and PMC®-780 WET - Shore 80A hardness
PMC®-790 Urethane Rubber - PMC®-790 is an industrial urethane rubber compound designed to meet the most stringent requirements of industrial production applications. It is a very hard rubber that offers superior tear and tensile strength as well as impact and abrasion resistance.PMC®-790 is suitable for a variety of industrial applications including making concrete stamping pads, mold liners and molds for casting concrete. PMC®-790 is also good for making ball mill liners, industrial rollers and belts, rubber mechanical parts.
PMC®-790 - Shore 90A hardness
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