Preparation method and application of aqueous polymer dispersant for inorganic powder

The invention belongs to the field of dispersing agents, and provides a preparation method and application of a water-based polymer dispersing agent for inorganic powder, maleic anhydride is dissolved in water, then neutralized with 2-aminoethanol, the pH is adjusted to 5.0-6.0, a chain transfer agent and a stabilizer are added, the mixture is heated to 60-70 DEG C, a mixed monomer composed of an initiator, (methyl) acrylic acid and a functional monomer is added, the mixture is heated to 60-70 DEG C, and the water-based polymer dispersing agent for inorganic powder is obtained. And adding a neutralizing reagent accounting for 70-100% of the mole number of carboxyl after the reaction is completed, and adjusting the pH value to obtain the liquid aqueous polymer dispersant. And carrying out spray drying on the liquid dispersant to obtain the solid dispersant. According to the preparation method, an aqueous solution polymerization system is adopted, required raw materials are easy to obtain and can be purchased o