Borchi Gel WN 50 S Polyurethane Bayer-Börchers Rheology Modifier/ Thickener >> Associative >> Urethane (HEUR) Acrylic/Acrylate Resins Epoxy Resins Vinyl Coatings >> Waterborne Marine /Anti-Corrosive / Protective water Borchi® Gel WN 50 S 1 Thickener for emulsion paints and aqueous paint systems Description Borchi® Gel WN 50 S is a polyurethanebased, non-ionic liquid thickener. lt also acts as a flow promoter in emulsion paints and stabilizes pigmented, aqueous paints. Properties The particular molecular structure of Borchi® Gel WN 50 S allows its adsorption at the surface of dispersed particles formed as a result of emulsion polymerization. lt is characterised by good efficiency. lt improves the rheological properties of emulsion paints, making the end-products easier to apply with a roller or a brush despite a considerable increase in viscosity. The product can be combined with other thickeners to achieve special effects. Since it improves the flow properties of emulsion paints, Borchi® Gel WN 50 S has proved particularly useful for thickening acrylic gloss paints and anti-corrosion coatings. At the recommended addition rate, Borchi® Gel WN 50 S does not adversely affect the water resistance of the films. Applications On the basis of our observations, Borchi® Gel WN 50 S is more effective in finely dispersed than in coarsely dispersed emulsions. Suitable emulsion systems include pure acrylic, styrene-acrylic and styrene-butadiene. Borchi® Gel WN 50 S is also used in water-emulsifiable 2-component epoxy resin systems and other water-emulsifiable air- and oven-drying binders. Mixing and addition rate The recommended addition rate is 0.1 - 2% thickener, relative to the total formulation. Because of its low intrinsic viscosity, Borchi® Gel WN 50 S can also be added after mixing without predilution to adjust viscosity. Larger quantities are generally needed for production of gloss paints. We recommend that Borchi® Gel WN 50 S is added directly to the mill base. The thickening action of Borchi® Gel WN 50 S can be reduced using polar, water-soluble, film-forming agents, e.g. alcohols and glycols. Butyl diglycol acetate and Texanol®, on the other hand, bring about an increase in viscosity. Since some formulations contain alcohol, it is advisable to test their effect on the viscosity of emulsion paints beforehand. In the case of gloss and silk-finish gloss paints, use of Borchi® Gen DFN or Borchi® Gen SN 95 as the dispersing agent is recommended to achieve good stability and prevent sedimentation and flocculation. Polyurethanebased, non-ionic liquid thickener. Acts as a flow promoter in emulsion paints and stabilizes pigmented aqueous paints. Allows its adsorption at the surface of dispersed particles formed as a result of emulsion polymerization. lmproves the rheological properties, making the end-products easier to apply with a roller or a brush despite a considerable increase in viscosity. Can be combined with other thickeners to achieve special effects. Useful for thickening acrylic gloss paints and anti-corrosion coatings. At the recommended addition rate, does not adversely affect the water resistance of the films. Effective in finely dispersed than in coarsely dispersed emulsions. Suitable emulsion systems include pure acrylic, styrene-acrylic and styrene-butadiene. Used in water-emulsifiable 2-component epoxy resin systems and other water-emulsifiable air- and oven-drying binders. Recommended usage level: 0.1 - 2% thickener, relative to the total formulation. Because of its low intrinsic viscosity, can also be added after mixing without predilution to adjust viscosity. Larger quantities are generally needed for production of gloss paints. Added directly to the mill base. The thickening action can be reduced using polar, water-soluble, film-forming agents, e.g. alcohols and glycols. Since some formulations contain alcohol, it is advisable to test their effect on the viscosity of emulsion paints beforehand.