Coated corrosion and scale inhibitor based on modified polyaspartic acid and preparation method thereof

The invention relates to the field of scale inhibitors, in particular to a coated corrosion and scale inhibitor based on modified polyaspartic acid and a preparation method of the coated corrosion and scale inhibitor. The scale inhibitor comprises polysuccinimide; the water-soluble zinc salt, the olefin amide, the amino-substituted sulfonic acid and the water-soluble low-molecular polyol are coated with the chitosan; the preparation method comprises the following steps: weighing polysuccinimide, dissolving polysuccinimide in water, and fully stirring; raising the temperature and adding a sodium hydroxide solution; weighing chitosan-coated water-soluble zinc salt, adding amino-substituted sulfonic acid, and adding a sodium hydroxide solution; and adding ethanol, settling, standing and filtering to obtain a precipitate, and carrying out vacuum drying, dialysis purification and rotary evaporation. According to the preparation method disclosed by the invention, by utilizing a graft polymerization reaction, polysu