Rheovis® CR2

Derivative of a family of highly effective rheological control additives for water-borne coating systems. Belongs to a family of products which are based on similar acrylic polymer technology with side groups designed to provide an associate thickening mechanism. Most effective over a pH range 7.5-10. Designed to give a more Newtonian rheology. Provides optimum flow and levelling properties for semi-gloss and high-build coatings. Less susceptible to microbiological attack than derivatives of cellulose. Consequently the paint formulator can substantially reduce the level of biocide leading to a broader area of application. Recommended usage level: 1.0-3.5% based on total formulation. Should preferably be added at the final stage of manufacturing of the coating – as opposed to addition to the pigment grinding stage - since destabilisation can occur at high shear stress. The liquid form makes this post-addition comfortable. As a positive side effect, the post-addition offers the flexibility in viscosity adjustment from batch to batch. After addition, the pH is adjusted with alkali, ammonia or other bases to achieve the full and stable viscosity. Use of volatile agents improves the water resistance properties of the dry film. The pH of the system during manufacturing of the coating should always be kept higher than 7.5 to prevent precipitation and consequent destabilisation of the formulation. In certain cases it may be advisable to dilute and pre-gel with alkali before addition. Recommended dilution factor is 1 part of additive and 5 parts of water.