Anti-Weathering Coatings
VueGuard® 911 — Anti-Weathering Water Clear Hardcoat (PC)
VueGuard® 911 anti-weathering water clear hardcoat for plastic sheets and molded articles, offering superior resistance to ultraviolet degradation and abrasion. While VueGuard® 911 has been designed primarily for polycarbonate substrates, other plastics may benefit from its application.
Polycarbonate Technical Data
Environmental Exposure
| Test | Unexposed | Humidity | Weathering |
|---|---|---|---|
| Light Transmittance (%) | 91 | 91 | — |
| Haze (%) | 0.4 | 0.5 | 1-2 * |
| Adhesion (%) | 100 | 100 | 100 |
| Yellowness Index Change | 0 | 0 | 3-4 * |
Humidity: 120 hours @ 52°C and 100% RH (ASTM D-2247)
Weathering: ASTM G-53 (8 hrs UV @ 70°C / 4 hrs condensing humidity @ 50°C for 2,500 hrs using Q-Panel QUV)
* After 2,500 hours of QUV exposure — start of color change of the polycarbonate substrate
Scratch & Abrasion Tests
| Haze Change (ASTM D-1003) | Uncoated | Coated |
|---|---|---|
| Steel-Wool Scratch #0000 pad at 50 psi for 100 rotations |
38.1 | 0.4 |
| Abrasion 250 cycles |
32.0 | 3-4 |
Chemical Resistance
| Chemical | Uncoated | Coated |
|---|---|---|
| Gasoline | X | M |
| Toluene | X | S |
| Acetone | X | S |
| Trichloroethylene | X | S |
| 5% Ammonia | S | L |
| 10% Caustic Soda | S | L |
| 50% Caustic Soda | X | M |
L — Long-term contact, greater than 24 hours •
M — Medium-term, up to 8 hours •
S — Short-term, up to 1 hour •
X — Immediate attack: do not use