Organoclay for water-based coatings

Organoclay for water – based coatings is produced using specific preparation methods to suit the characteristics of water – based systems.

One key method is the pre – gel method: sodium bentonite, obtained by modifying and purifying raw bentonite ore, is mixed with organic solvents. The added organic solvents are hydrophobic, which allows them to extract hydrophobic bentonite into the organic phase.

The product is then obtained after separation and evaporation to remove water. Another approach is the auxiliary synthesis method, which mainly uses microwave or ultrasonic assistance during the wet preparation of organoclay.

Specifically, bentonite powder is added to a surfactant solution of a certain concentration, fully stirred into a slurry, treated with microwave or ultrasonic waves, then filtered, dried, ground, and sieved to get the final product.

Organoclay-based additives improve suspension stability and application rheology in waterborne systems; the primary reference is organoclay thickener for water-based coatings. The broader family of rheology modifiers for waterborne coating systems is classified and compared on our rheology modifier page. The full coatings context is at organoclay for coatings — water-based systems. For bentonite-based products adapted for aqueous systems, see water-based bentonite for coatings formulation. Additive selection criteria for waterborne paints are covered in water-based paint additives — organoclay grade selection.