Influence of Different Binder Types on the Under Different Storage Time

By Simon Aben, Jörg Rüger, Mark Coward

Biocides, especially isothiazolinones, can often trigger allergic reactions, which, in recent years, has driven
the demand for water-based, biocide-free paints for interior and exterior areas, as well as regulation. Silicate paints are an alternative, as they use liquid glass (i.e., liquid potassium silicate), rather than biocides, as a
mineral/inorganic binder to adjust the paint pH so that bacteria growth is inhibited. To support paints and coatings formulators in their binder decision-making, we investigate the influence of binder choice on the wet scrub resistance of organosilicate paint (a silicate paint with a binder modification of more than 5%, which shows good adhesion to a variety of substrates) under various storage conditions, comparing four vinyl acetate ethylene (VAE) binders against each other and against the performance of several styrene acrylate binders.