Low-VOC, Self-Priming Conformal Coatings

Electrically insulating conformal coatings are used to protect electronic components including antennas from corrosion. A low VOC, non-chromated flexible coating is proposed for protecting aircraft antenna components in the corrosive marine environment.Novel elastomeric resins having inherent corrosion inhibiting qualities will be formulated with non-metallic anticorrosive agents to yield self-priming coatings with excellent adhesion to antenna structures, flexibility and high durability. The proposedresearch seeks to apply a proprietary chemical technology to the formulation of low VOC, non-chromate conformal coating systems that meet the current MIL-I-46058C specification. The proposed anticorrosion formulations will readily form low permeability,conformal films that adhere strongly without the need for priming. The development of new multi-function polymeric additives should significantly improve the formulation properties and allow conventional spray application of the primerless coatings. Thenew conformal coatings will be tested against conventional solventborne systems for adhesion, electrical insulation and corrosion inhibition. The ability to form adherent, highly flexible and durable barrier coatings over non-ferrous metals and crosspolarizer materials without primers would represent a significant advancement in corrosion engineering and aerospace maintenance technology. The new coatings will be thoroughly screened for corrosion prevention, electrical insulation properties, andadhesion according to standard methods.