Organoclay for coatings

When it comes to organoclay for coatings, it is a key additive made from bentonite.

Taking advantage of the layered structure of montmorillonite in bentonite and its characteristic of swelling and dispersing into colloidal particles in water or organic solvents, it is manufactured by incorporating organic covering agents via ion exchange. This non – metallic mineral presents as white or light yellow solid powder with layered solid particles.

In coating systems, organoclay boosts viscosity, thixotropy, and anti – settling performance through interlayer water absorption, swelling, and ion exchange. It slightly enhances system adhesion, leading to effective atomization of spray materials and neat, tight particle arrangement.

In contrast, hydroxyethyl cellulose (or ethyl hydroxyethyl cellulose), an organic non – ionic solid from etherification, increases viscosity but reduces atomization and particle arrangement, highlighting organoclay’s unique benefits for coatings.

Organoclay is the preferred rheology modifier and anti-settling agent across all coating types; the full application overview is at organoclay for coatings and industrial paint formulation. Product grades and technical data sheets are listed on the organoclay technical grade for coating systems page. For solvent-borne systems specifically, see organoclay for solvent-based coatings and lacquers. A comparative evaluation of rheology modifiers for paints — selection guide covers organoclay alongside alternative thickeners. The complete product overview is available in organoclay for coatings and paints — product overview.