| About |
|---|
| VA-273 is a high heat polyurethane formulated for hand-batch or vacuum assisted casting methods. Excellent physical properties can be obtained without the utilization of mercury, MOCA, or TDI. The unique chemistry of VA-273 imparts excellent optical clarity as well as U.V. stability. With a short post cure, exceptional heat resistance may be achieved.&& |
| Product Description | |
|---|---|
| Generic | TSU |
| Material Status | Commercial: Active |
| Features | Weather resistance is good,Good Clarity,High Heat Resistance |
| Availabilitys | North America |
| Technical Data | |||
|---|---|---|---|
| PHYSICAL | Nominal value | Unit | Test method |
| Density | |||
| Hardener | 1.08 | g/cm³ | |
| Curing treatment | 1.14 | g/cm³ | |
| Matrix resin | 1.16 | g/cm³ | |
| Shrinkage rate | |||
| MD | 0.10 to 0.50 | % | ASTM D2566 |
| MECHANICAL | Nominal value | Unit | Test method |
|---|---|---|---|
| Bending modulus | 2410 | MPa | ASTM D790 |
| bending strength | 110 | 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 | |||
| 25℃ | 0.90 | Pa·s | |
| 25℃ | 1.0 | Pa·s | |
| 25℃ | 2.1 | Pa·s | |
| Curing time | |||
| 25℃ | 1.7E+2 | hr | |
| Gelation time | 10 to 14 | min |
| Cured Properties | Nominal value | Unit | Test method |
|---|---|---|---|
| Shore hardness | |||
| Shaw’s D | 80 to 90 | ASTM D2240 | |
| tensile strength | 62.1 | MPa | ASTM D638 |
| Tensile strain | |||
| fracture | 4.0 | % | ASTM D638 |
| THERMAL | Nominal value | Unit | Test method |
|---|---|---|---|
| Hot deformation temperature | ASTM D648 | ||
| 0.45 MPa, unannealed | 65.0 | ℃ | ASTM D648 |
| 1.8 MPa, unannealed | 58.0 | ℃ | 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: 37 按容量计算的混合比: 40 | ||
| stripping time | 120 to 240 | min |
| Notes |
|---|
| 1. Typical properties: these are not to be construed as specifications. |
| 2. Resin |
| 3. Mixed |
| 4. Hardener |
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