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Coatings Ingredients
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Coatings Ingredients
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Rheovis® PU20

Technical Datasheet | Supplied by BASF
Derivative of a family of highly effective rheological control additives for water-borne coating systems. Excellent rheological control additives offering an outstanding balance of low viscosity at low shear rates and high viscosity at high shear rates. This property is derived from the molecular bulk of the urethane polymer as well as its association with other components of the formulation, especially resins and results in excellent flow, levelling and brush drag properties, even in the absence of coalescing solvents. The main application are high-build coatings, e.g. high quality wood coatings. Effective over the pH range 4-10 thus allowing optimal formulation flexibility. Allows formulation of paints with close to ideal rheology, i.e. hardly any change of dynamic viscosity over a wide shear rate interval. This is of special advantage when the formulator wants to offer maximum handling flexibility to the applicators. However, the achievable rheology behaviour in a given system also depends on the type and concentration of other paint components, namely surfactants and coalescence solvents. Depending on the choice of the coalescing solvent, relatively small amounts may result in significantly increased or reduced viscosity. In case of too low viscosity at low shear rates (settlement of liquid paint formulation during storage or sagging after application) it is recommended to use a synergistic combination with complementary additives (increasing thixotropic effects). Recommended usage level: 0.5-1.5% based on total formulation. may be poured into the coating formulation anywhere in the process. Mainly for practical reasons post-addition of the products is recommended. Pre-dilution should not be neccesary as they are supplied at a very manageable viscosity.If, however, dilution is required, may be diluted with water alone.
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Product Type
Rheology Modifiers / Thickeners > Associatives > Hydrophobically Modified Ethoxylate Urethanes (HEUR)
Product Status
COMMERCIAL
Applications/ Recommended for
  • Coatings > Waterborne
  • Coatings Markets > Wood & Furniture Coatings
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