BYK-220 S

BYK 220 S is a wetting and dispersing additive for ambient-curing plastic systems and solvent-borne coatings. It contains silicone and is a solution of a low molecular weight, unsaturated acidic polycarboxylic acid polyester with a polysiloxane copolymer. BYK 220 S improves the dispersion of all conventional fillers, such as calcium carbonate and aluminum hydroxide. It reduces the viscosity of the filled resin, which enables an increased filler content and significantly reduces the settling of the filler during storage and processing. BYK 220 S provides a targeted, controlled flocculation of the pigments. It builds bridges between individual pigment particles, thereby creating three-dimensional networks. This controlled flocculation primarily prevents flooding/floating along with settling and sagging. BYK 220 S increases gloss, prevents floating and reduces millbase viscosity.