Wesel, June 6, 2005

BYK®-425: To Counteract Settling and Sagging in Aqueous Systems

This additive is suitable for aqueous and water-reducible systems and shows a broad compatibility with many aqueous binder systems. The additive creates a pseudoplastic flow behavior and improves sag resistance and anti-sedimentation.

BYK®-425  is a VOC and APEO free solution of an urea modified polyurethane. It is added under stirring during the last stage of paint production.

Due toits high effectiveness BYK®-425 is also suitable to increase in-can viscosity and to adjust flow properties of pigment pastes. To optimize anti-settlingproperties and improve storage stability it isrecommended to use BYK®-425in combination with BYK®-420.