Applications
Used by casting in silicone molds for making flexible prototype parts or small series of rubber-like parts.
Properties
- 3-components polyurethane elastomers for vacuum casting
- Hardness is easily adjusted from Shore A 90 to 20 with part C
- Good mechanical properties
- Low chemical attack towards silicone molds
Physical Properties
| PART A or AK * | PART B | PART C | MIXING | |
|---|---|---|---|---|
| Composition | POLYOL | ISOCYANATE | POLYOL | |
| Mixing ratio by weight | 100 | 100 | 0 – 500 | |
| Aspect | liquid | liquid | liquid | |
| Color | A=Colorless AK= Black | Colorless | Milk white | A/B/C = Off white AK/B/C= Black |
| Brookfield LVT viscosity at 25°C(mPa.s) | 380 | 420 | 480 | |
| Density of parts before mixing | 1.05 | 1.20 | 1.03 | |
| Pot life at 25°C (200 g) (min) | 14 – 16 | |||
| Pot life at 35°C (200 g) (min) | 9 – 11 |
Mechanical properties at 23°C
| Mixing Ratio | A :B :C | 100 :100 :0 | 100 :100 :50 | 100 :100 :100 | 100 :100 :150 |
|---|---|---|---|---|---|
| Hardness ISO868 :2003 | Shore A | 86 | 80 | 72 | 65 |
| Elongation ISO37 :2005 | % | 450 | 470 | 500 | 490 |
| Tensile trength ISO37 :2005 | MPa | 22 | 18 | 13 | 12 |
| Tear strength ISO34 :2004 | N/mm | 70 | 60 | 45 | 34 |
| Mixing Ratio | A :B :C | 100 :100 :200 | 100 :100 :300 | 100 :100 :400 | 100 :100 :500 |
|---|---|---|---|---|---|
| Hardness ISO868 :2003 | PART A or AK * | 58 | 43 | 28 | 16 |
| Elongation ISO37 :2005 | % | 520 | 540 | 580 | 660 |
| Tensile trength ISO37 :2005 | MPa | 10 | 8 | 7 | 6 |
| Tear strength ISO34 :2004 | N/mm | 25 | 16 | 14 | 12 |
Contact us to discuss your rubber parts and discover how vacuum casting can meet your needs.
Our vacuum casting services deliver flexible prototype and low-volume rubber-like parts.