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.