5213 can endow water-based coatings with excellent flow and leveling properties as well as gloss development and medium shear viscosity. This product does not contain tin compounds and toluene and it is a non-toxic, odorless and environment friendly rheology modification additive. It is especially suitable for water-based systems that has high request for rheology, leveling and thickening together. It has a good brushing feel and excellent anti roller splash. It also has water resistance, alkali resistance, scrub resistance, stain resistance and water outflow resistance. Meanwhile, it has good flow, rheology and hiding effect, uniform film thickness and film fullness, and it does not affect the gloss characteristics of the film. It is not affected by PH value, and can be used in a wide range of PH values, and, it can be added easily at any stage of paint production, without any dilution before use, without the need to neutralize with alkali, and the flow level and thickening properties can be achieved in an instant.