BYK-D 420

Liquid rheology additive for aqueous and water-reducible coating systems for improving anti-sagging and anti-settling properties. The additive is also especially suited for manufacturing aqueous pigment concentrates. BYK-D 420 causes thixotropic flow behaviour; post-addition is possible. After being stirred into the coating system, the additive generates a three-dimensional network structure. The resulting thixotropic flow behaviour is highly suited for preventing sedimentation and syneresis and increasing the anti-sagging properties without impairing leveling. The additive is liquid and therefore easy to handle. It is not necessary to specifically adjust the pH value or control the temperature during incorporation. BYK-D 420 is preferably used as an anti-settling additive to produce aqueous pigment, filler and matting agent concentrates. The additive's excellent shear thinning effect is advantageous for dosing such concentrates because of their low viscosity. In addition, it is suitable for controlling the thixotropic flow behaviour and for optimising the anti-sagging properties and leveling.