Aquatix® 8421

The rheology additive improves the orientation of effect pigments and reduces cloudiness / mottling. At the same time it reduces sedimentation in the coatings during storage and processing. In comparison with polyurethane thickeners the additive displays a lower cosolvent sensitivity and incorporation and handling (ready to use) is ignificantly easier compared with clays and acrylate thickeners. Aquatix® 8421 is extremely well suited to improving the rheological properties and the brilliance of cosolvent-free effect pigment slurries.

Incorporation and Processing Instructions

Aquatix® 8421 should preferably be incorporated in the coating at a low shear rate after the effect pigment preparation has been added. There is no need to pre-dilute with water. As a result of the acidic character of Aquatix® 8421, the pH value of the system is reduced. It is therefore recommended that the pH value is adjusted to 9 - 9.5 before adding the additive. The higher the cosolvent content of the formulation, the more important it is to adjust the pH value. The final viscosity should not be adjusted using a flow cup but using a rotational viscometer (e.g. Brookfield)

Non-ionic emulsion of a modified ethylene vinyl acetate copolymer wax (EVA)

Temperature sensitive. To be stored and transported between 5 °C and 35 °C. Stir before use.