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

Published on 2005-06-13. Author : SpecialChem

BYK®-425 completes the range of liquid rheology additives of BYK-Chemie.

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

Source: Byk-Chemie


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