Rheological additive，This is an organic bentonite clay, which is an additive to oilfield drilling fluids. It is divided into low polarity, medium polarity and high polarity thickening rheology agents.

It is currently widely used in paints, coatings, greases, oil films and drilling fluids. They can exert relatively good suspension performance and anti-settling performance in water-based paints and coatings and solvent-based paints and coatings.

Organoclay is a clay-mineral rheology modifier that provides shear-thinning behaviour and thixotropic recovery in solvent-based systems where cellulosic or polyurethane thickeners are incompatible; the full product range and classification are at rheology modifiers — organoclay classification and performance overview. Rheological additive types, performance comparisons, and selection criteria across different system polarities are covered in rheological additives — types, performance, and selection guide. To source clay-mineral rheology modifiers directly from the manufacturer, see organoclay supplier — clay-mineral rheology modifier factory.