BYK 347

BYK 347 produces a significant decrease in the surface tension of aqueous systems and therefore particularly improves substrate wetting and levelling. It only marginally, if at all, stabilises foam and the re-coatability is not impaired. BYK-347 is characterised by its good substrate wetting properties, particularly also with thin-layered application. The additive does not increase the surface slip. If a greater surface slip is required, we recommended that it is combined with a polysiloxane such as BYK 333. The silicone surfactant has applications in aqueous coatings, printing inks and overprint varnishes. It provides particularly good re-coatability with thin layers.