RM-550-IB is an inorganic black paint, originally designed for use on spacecraft and satellites. A highly specialized pigment with a silicate binder ensures that RM-550-IB can be applied over complex surfaces with relative ease compared to other inorganic thermal control paints and forms a bendable ceramic nonspecular black coating when processed properly. RM-550-IB can be utilized in the Low Earth Orbit (LEO) space environment due to its resistance to the deleterious effects of the Atomic Oxygen (AO) flux found there.
RM-550-IB has been thoroughly tested in space, having been flown on the Optical Properties Monitor (OPM) and the Materials International Space Station Experiment (MISSE).
The table below lists the optical and application parameters of cured RM-550-IB.
|Nominal Surface Resistivity
|Thermal Emittance (ε_t)
|0.91 ± 0.02
|Solar Absorptance (α_s)
|0.97 ± 0.02 at ≥ 1.5 mils thickness
|Use Temperature Range
|-180 C to 1100 C
|Nonspecular optical black
|Nominal Dry Thickness
|3.0+1.0, -1.5 mils (over 85% of coated area)
|ASTM D3359A Adhesion Grade
|Not less than 3A
Note: terms reflectance, emittance and absorptance and terms reflectivity, emissivity and absorptivity are often used interchangeably.