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.