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AZ-400-LSW White Thermal Control Paint / Coating
AZ-400-LSW is an organic white thermal control paint developed for use on spacecraft and satellites to coat hard anodized aluminum. A specialized pigment in a silicone binder, AZ-400-LSW can be spray deposited with an air brush or high-volume low-pressure system with the ease of other silicone paints to form a flexible organic nonspecular white marker paint. AZ-400-LSW meets flammability and toxicity requirements of NHB 8060.1C.
The main advantage of AZ-400-LSW relative to AZ-93 and AZW/LA-II is that it has very low out outgassing and does not require controlled temperature and humidity when applying.
The table below lists the optical and application parameters of cured AZ-400-LSW.
| Nominal Surface Resistivity |
N/A |
| Thermal Emittance (ε_t) |
0.91 ± 0.02 |
| Solar Absorptance (α_s) |
0.17 ± 0.02 at ≥ 3.0 mils thickness |
| Use Temperature Range |
-180 C to 700 C |
| Appearance/Color |
Nonspecular optical white |
| Nominal Dry Thickness |
3.0 ± 1.0mils (over 85% of coated area) |
| ASTM D3359A Adhesion Grade |
Not less than 3A |
| Full Cure |
48 to 72 hours |
View a typical spectral reflectance curve for AZ-400-LSW (pdf 27KB). Measurements were taken with AZ Technology’s Laboratory Portable SpectroReflectometer LPSR-300.
Note: terms reflectance, emittance and absorptance and terms reflectivity, emissivity and absorptivity are often used interchangeably. |
