| About |
|---|
| VA-274 is a water clear, rigid polyurethane formulated for room temperature hand-batch or vacuum assisted casting methods. Excellent physical properties can be obtained without the utilization of mercury, MOCA, or TDI. VA-274 is low viscosity to be used in applications with thin wall sections for excellent flow rates.&& |
| Product Description | |
|---|---|
| Generic | TSU |
| Material Status | Commercial: Active |
| Features | Good Rigidity,High liquidity,Low Viscosity |
| Availabilitys | North America |
| Technical Data | |||
|---|---|---|---|
| PHYSICAL | Nominal value | Unit | Test method |
| Density | |||
| Hardener | 1.05 | g/cm³ | |
| Curing treatment | 1.08 | g/cm³ | |
| Matrix resin | 1.16 | g/cm³ | |
| Shrinkage rate | |||
| MD | 0.50 to 1.0 | % | ASTM D2566 |
| MECHANICAL | Nominal value | Unit | Test method |
|---|---|---|---|
| Bending modulus | 2520 | MPa | ASTM D790 |
| bending strength | 115 | MPa | ASTM D790 |
| IMPACT | Nominal value | Unit | Test method |
|---|---|---|---|
| Impact strength of cantilever beam notch | 53 | J/m | ASTM D256 |
| Uncured Properties | Nominal value | Unit | Test method |
|---|---|---|---|
| viscosity | |||
| — | 0.73 | Pa·s | |
| — | 0.75 | Pa·s | |
| — | 0.90 | Pa·s | |
| Curing time | 40 | hr | |
| Gelation time | 15 to 21 | min |
| Cured Properties | Nominal value | Unit | Test method |
|---|---|---|---|
| Shore hardness | |||
| Shaw’s D | 80 to 86 | ASTM D2240 | |
| tensile strength | 67.6 | MPa | ASTM D638 |
| Tensile strain | |||
| fracture | 7.0 | % | ASTM D638 |
| THERMAL | Nominal value | Unit | Test method |
|---|---|---|---|
| Hot deformation temperature | ASTM D648 | ||
| 0.45 MPa, unannealed | 74.0 | ℃ | ASTM D648 |
| 1.8 MPa, unannealed | 70.0 | ℃ | ASTM D648 |
| Thermosetting components | |||
| resin | 按重量计算的混合比: 100 按容量计算的混合比: 100 | ||
| Hardening method | 按重量计算的混合比: 50 按容量计算的混合比: 55 | ||
| stripping time | 240 to 480 | min |
| Notes |
|---|
| 1. Typical properties: these are not to be construed as specifications. |
| 2. Hardener |
| 3. Mixed |
| 4. Resin |
| 5. 24 hours at 77°F + 16 hours at 180°F |
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