MIL-PRF-85322C, PERFORMANCE SPECIFICATION: COATING, ELASTOMERIC, POLYURETHANE, RAIN-EROSION (21-MAY-2014) [SUPERSEDING MIL-C-85322B]

MIL-PRF-85322C, PERFORMANCE SPECIFICATION: COATING, ELASTOMERIC, POLYURETHANE, RAIN-EROSION (21-MAY-2014) [SUPERSEDING MIL-C-85322B]., This specification establishes the requirements for rain erosion coatings with a maximum volatile organic compound (VOC) content of 420 grams/liter (g/L) (3.5 pounds/gallon (lb/gal)) for use on exterior aircraft structures. The antistatic component (if applicable) will have a maximum VOC limit of 720 grams/liter (g/L) (6.0 lb/gallon (lb/gal)). The material covered by this specification is intended as a rain-erosion coating for aircraft radomes and leading edges. Class B of this polyurethane coating is primarily for use on heated leading edges that are subjected to temperatures of up to 250˚F (120˚C). Grade B of this polyurethane coating is intended for use on aircraft weapons systems where discharge and dissipation of static electricity is necessary to alleviate radio and radar interference. The use of an aliphatic polyurethane topcoat is recommended as this coating may fade when exposed to sunlight.