Elastomeric coatings

A process for producing a polymer nanocomposite coating, the process comprising spraying a blend of an elastomer and conductive nanopanicies onto a substrate to form a film on the substrate, wherein:

• the blend comprises at least 40 wt % of the conductive nanoparticles based on the combined weight of the elastomer and the conductive nanoparticles,
• for nanoparticles having an aspect ratio of less than 20:1, the conductive nanoparticles have an average particle size along each dimension of less than 500 nm,
• for nanoparticles having an aspect ratio of 20:1 or greater, the conductive nanoparticles have an average particle size along each dimension of less than 2000 nm, and
• the conductive nanoparticles form micro- and nano-sized aggregates on the substrate, the aggregates having re-entrant morphology, and
• optionally curing or cross-linking the film.