Microcapsule-protected actives reduce leaching

Polystyrene was studied as a novel encapsulating polymer to reduce the release rates of biocides in coatings and so extend their useful life. PS microcapsules containing IPBC biocide were compared with 'free' IPBC and commercial microcapsules containing it. The experimental microcapsules were as effective as the commercial products, despite a slower biocide release rate. The hindered release of biocide is expected to provide a longer service life