Low shear thickener for water-based coatings systems, VOC-free, APEO-free, tin-free
Appearance Clear to slight turbid, colorless to yellowish liquid Metal content Zr: 9,80 – 10,20 % ISO 4619 Density 1,33 g/cm3 DIN 51757 (20°C)
Borchi® Gel NA is a thixotropic additive for use in water based coating systems whose binders contain free hydroxyl and carboxyl groups. Borchi® Gel NA thickens by association of the Zirconium complex with the binder’s reactive groups and has been shown to increase the scrub resistance of the cured film. Borchi® Gel NA develops viscosity in the low shear (<1000 s-1) range to prevent settling and separation. The structure easily breaks down during application yet maintains some structure to yield good brush/roller loading and eliminate drips and spatter. Once applied the structure rebuilds slowly for improved flow and leveling while retaining good sag resistance.
Borchi® Gel NA improves the viscosity stability of a coating after tinting with Universal Colorants.
Borchi® Gel NA is an environmentally friendly water based additive which contains no VOC contributing raw materials.
Borchi® Gel NA can as well be used as post additive to adjust the final viscosity of a formulation.
Borchi® Gel NA is compatible with other thickeners (e.g. cellulosic, HEUR, HASE, ASE), can be used in a wide range of polymer systems (vinyl acetate, acrylic, styrene acrylic, colloid and surfactant stabilized
polymers) and gloss ranges (matte through gloss). It can be used in interior and exterior coatings.
Typical usage levels are 0.5 – 2.0% as supplied based on the total weight of the formula. In difficult systems it could be necessary to increase the dosage up to 5% (as supplied) on total formulation. The degree of
thixotropy will depend upon the type of reactive groups present in the system, the pH of the coating (ideally between 7.5 and 8.5), the level of the desired gel structure and the amount of Borchi® Gel NA used. The exact dosage should be experimentally determined. We recommend adding Borchi® Gel NA at the end of the formula under good mixing conditions to prevent gel seeds from forming and to develop a homogeneous
Protect from the effects of weathering and store at temperatures between 5 and 30 °C. Once opened, containers should be resealed immediately after each removal of the product.
Please refer to our safety data sheet for information relating to product safety
- Europe : EINECS
- Korea : ECL
- Taiwan : NECI