IsoCast RCR 739 (Formerly PAK Mark 15) is used to make castings from rigid and flexible molds. Some of the most common uses of IsoCast RCR 739 are point-of-purchase displays, rapid prototypes, special effects, taxidermy, and sculpture reproductions. However IsoCast RCR 739 can be used for any application that requires a lightweight, durable plastic.
IsoCast RCR 739 is a two-part, MDI-based polyurethane casting system. It is mixed one-to-one by volume and cures at room temperature. IsoCast RCR 739 begins to gel in about 15 minutes and cures to a white color.
Advantages
- Convenient mixing ratio (s)
- Fast hardness development
- Low shrinkage
Product Types
Casting Resin
Product Testing
| Test Performed | Test Results |
| Color - ISO | Amber |
| Color - POL | White |
| Compound Specific Gravity | 1.09 |
| Compressive Strength - ASTM D695 | 10,200 psi |
| Compressive Yield Strength - ASTM D695 | 10,200 psi |
| Demold Time | 0.5-1 Hour |
| Elongation - ASTM D412 | 10 % |
| Full Cure | 7 Days |
| Hardness - ASTM D2240 - Shore D | 76-80 Shore D |
| Izod Impact Notched - ASTM 256A | 0.11 ft.lb/in |
| Izod Impact Unnotched - ASTM 256E | 13.4 ft.lb/in |
| Izod Impact-Notched, Four Specimens - ASTM D256-93A | 0.21 ft.lb/in |
| Linear Shrinkage - ASTM D2566 | 0.001 in/in |
| Mix Time - by Hand | 1 Minutes |
| Modulus of Elasticity - ASTM D790 | 1897 psi |
| Pot Life - 100g | 12-15 Minutes |
| Ratio by Volume - ISO:POL | 1-1 |
| Ratio by Weight - ISO:POL | 1.09-1 |
| Rebound, Bayshore % - ASTM D2632 | 20 % |
| Shrinkage | 0.001 % |
| Split Tear - ASTM D470 | 115 pli |
| Stress - ASTM D790 - at 5% Strain | 68.2 psi |
| Tear Strength - ASTM D624, Die C | 820 pli |
| Tensile Strength - ASTM D412 | 8000 psi |