Carbomer U21 is a hydrophobically modified, cross-linked acrylate copolymer. In addition to the high-efficiency thickening and suspending functions of traditional Kabo resin, this product can self-wet and disperse within minutes, and provides higher viscosity, with smooth, short rheological characteristics, in a wide range of pH It has high-efficiency thickening performance within the range; at the same time, it can be used in systems containing moderate surfactants, which can provide electrolyte resistance and unique feeling to the formulation, making it suitable for many applications. Therefore, as a water-soluble rheology modifier, this product can provide many important advantages for product formulators.