Water-based boiling-resistant baking varnish for packaging barrel and preparation method of water-based boiling-resistant baking varnish

The invention relates to the technical field of paint preparation, in particular to water-based boiling-resistant stoving varnish for a packaging barrel and a preparation method thereof.The preparation method comprises the steps that water-based acrylic acid modified alkyd resin and an ammonia neutralizer are stirred and neutralized, and first stirred liquid is obtained; deionized water, a dispersing agent, a wetting dispersing agent, a defoaming agent, fumed silica and coloring paint are added into the first stirring liquid to be stirred, and second stirring liquid is obtained; dispersing the second stirring liquid by using a sand mill, and transferring into a paint mixing cylinder; and adding the waterborne polyurethane rheological agent, the base material wetting agent, the cosolvent, the modified epoxy adhesion promoter, the waterborne amino resin, the waterborne phenylamino resin and the deionized water into a paint mixing cylinder, stirring and dispersing, and filtering to obtain the waterborne boiling-