| About |
|---|
| VA-286 is a tough, heat-resistant polyurethane formulated for vacuum assisted casting systems and short mold cycle times. Excellent physical properties can be obtained without the utilization of mercury, MOCA, or TDI. VA-286 has a longer gel time than VA-285, allowing for larger castings. VA-286 can be easily pigmented.&& |
| Product Description | |
|---|---|
| Generic | TSU |
| Material Status | Commercial: Active |
| Features | Good flexibility,Quick molding cycle,Heat Resistance, Good |
| Availabilitys | North America |
| Technical Data | |||
|---|---|---|---|
| PHYSICAL | Nominal value | Unit | Test method |
| Density | |||
| Hardener | 1.13 | g/cm³ | |
| Curing treatment | 1.20 | g/cm³ | |
| Matrix resin | 1.25 | g/cm³ | |
| Shrinkage rate | |||
| MD | 0.20 to 0.50 | % | ASTM D2566 |
| MECHANICAL | Nominal value | Unit | Test method |
|---|---|---|---|
| Bending modulus | 2520 | MPa | ASTM D790 |
| bending strength | 93.1 | MPa | ASTM D790 |
| IMPACT | Nominal value | Unit | Test method |
|---|---|---|---|
| Impact strength of cantilever beam notch | 37 | J/m | ASTM D256 |
| Uncured Properties | Nominal value | Unit | Test method |
|---|---|---|---|
| viscosity | |||
| 38℃ | 0.20 | Pa·s | |
| 38℃ | 0.50 | Pa·s | |
| 38℃ | 0.97 | Pa·s | |
| Curing time | 25 | hr | |
| Gelation time | 7.0 to 11 | min |
| Cured Properties | Nominal value | Unit | Test method |
|---|---|---|---|
| Shore hardness | |||
| Shaw’s D | 80 to 90 | ASTM D2240 | |
| tensile strength | 68.9 | MPa | ASTM D638 |
| Tensile strain | |||
| fracture | 5.0 | % | ASTM D638 |
| THERMAL | Nominal value | Unit | Test method |
|---|---|---|---|
| Hot deformation temperature | ASTM D648 | ||
| 0.45 MPa, unannealed | 95.0 | ℃ | |
| 1.8 MPa, unannealed | 84.0 | ℃ | |
| Thermosetting components | |||
| resin | 按容量计算的混合比: 100 按重量计算的混合比: 100 | ||
| Hardening method | 按容量计算的混合比: 60 按重量计算的混合比: 54 | ||
| stripping time | 45 to 75 | min |
| Notes |
|---|
| 1. Typical properties: these are not to be construed as specifications. |
| 2. Resin |
| 3. Mixed |
| 4. Hardener |
| 5. 24 hours at 77°F + 1 hour at 150°F |
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