Water-based acrylic resin and preparation method thereof

The invention discloses a preparation method of a water-based acrylic resin, and the water-based acrylic resin prepared by the method. The method comprises the following steps: adding an organic solvent and a chain transfer agent into a reactor, and mixing; adding a mixture A1, wherein the mixture A1 comprises an acrylic monomer I, organic silicon and an initiator; adding a mixture A2, and reacting, wherein the mixture A2 comprises an organic solvent, a chain transfer agent and an initiator; adding a mixture B1, wherein the mixture B1 comprises an acrylic monomer II, organic silicon and an initiator; and adding a mixture B2, and reacting, wherein the mixture B2 comprises an organic solvent, a chain transfer agent and an initiator. A paint film formed by the acrylate water-based dispersionbody prepared by the invention has excellent performances such as good water resistance, impact resistance, glossiness, higher hardness, adhesive force and the like. 本发明公开了一种水性丙烯酸树脂的制备方法及由所述方法制得的水性丙烯酸树脂，该方法包括以下步骤：向反应器中加入有机溶剂和