Preparation method of organosilicone modified hydroxy acrylic resin aqueous dispersion

The invention belongs to the field of chemical coatings, and particularly relates to a preparation method of an organosilicone modified hydroxy acrylic resin aqueous dispersion. The method comprises the following steps: preparing an organosilicone modified hydroxy acrylic resin by orderly dropwise adding different mixed liquids; removing part of solvents in the organosilicone modified hydroxy acrylic resin, and carrying out a neutralized salifying reaction; and finally, dispersing the obtained product into water so as to prepare the organosilicone modified hydroxy acrylic resin aqueous dispersion. The method mainly solves a problem that the storage stability of previous organosilicone modified acrylic emulsions is poor, and the stability of the prepared dispersion is significantly improved. A two-component waterborne polyurethane coating prepared through the combination of the dispersion and a waterborne polyisocyanate curing agent has the characteristics of high gloss, good mechanical properties, and good wa