Single-component self-drying water-soluble insulating paint as well as preparation method and application thereof

The invention discloses a single-component air-drying water-soluble insulating paint as well as a preparation method and application thereof. The water-soluble insulating paint is prepared from the following raw materials: polyol, anhydride, a neutralizer, a cosolvent, water, linoleic acid, methyl methacrylate, styrene, butyl acrylate, acrylic acid, an initiator and a drier. The preparation method comprises the following steps: carrying out a condensation polymerization reaction on the polyol and the anhydride, adding the linoleic acid to continuously carry out the condensation polymerization reaction, adding the methyl methacrylate, the styrene, the butyl acrylate, the acrylic acid and the initiator, carrying out a mixed reaction, adding the neutralizer, the cosolvent and the water, carrying out a reaction, and adding the drier. In the preparation process, at least the step (3) and the step (4) are controlled to be carried out in an oxygen-free environment; the insulating paint disclosed by the invention has