Preparation method of alkyd emulsion for light corrosion prevention field

The invention discloses a preparation method of an alkyd emulsion used in the field of light corrosion prevention, and relates to the field of corrosion prevention. Comprising the following steps: preparing an alcohol acid intermediate from vegetable fatty acid, glycerol, pentaerythritol, phthalic anhydride, rosin and acrylic acid; under the action of an initiator, grafting an acrylate monomer through a bulk polymerization method, and neutralizing to obtain a to-be-emulsified substance; and adding pure water in a high-speed dispersion machine to obtain the alkyd emulsion. The preparation method comprises the following steps: carrying out high-temperature esterification on vegetable fatty acid, phthalic anhydride, glycerol, pentaerythritol and rosin, cooling after the acid value is qualified, and adding acrylic acid for low-temperature esterification to obtain an alcohol acid intermediate; the raw materials used by the alcohol acid intermediate are basically derived from organisms, belong to renewable resource