Technology Demonstration of Self-Healing Coatings for In-Place Management of Lead-Based Paint Hazards

摘要

Microcapsules on the order of 50-150 microns in size have been developed that can contain and release a small quantity of self-repairing compound in liquid form when they are broken. These microcapsules are mixed in commercially available latex paints and used to overcoat lead-based paint. Should the overcoating become damaged, the microcapsules break open and release liquid coating repair and lead dust suppression compounds. In effect, the coating becomes self-healing when damaged. The self-healing coatings were tested in the laboratory and demonstrated on a wooden building at the former Fort Ord, CA. In both cases, when the self-healing coatings were applied to lead based paint, cut, and wipe tested, significant reductions in lead dust were realized compared with the results of applying the same test procedure to plain latex paint overcoatings.