Water-based oxidation cross-linked resin drier and preparation method thereof

The invention relates to a water-based oxidation cross-linked resin drier and a preparation method thereof. The preparation method comprises the following specific steps of: preparing a dimethylolbutyric acid solution from dimethylolbutyric acid, water and a cosolvent; taking the dimethylolbutyric acid solution, adding powdery cobalt hydroxide, reacting, filtering, testing the content of cobalt metal in filtrate, and replenishing water or a cosolvent until the cobalt content is 4-4.5 wt% to obtain an intermediate product 1; taking the intermediate product 1, dropwise adding a metal activity accelerant solution, and stirring to obtain an intermediate product 2; taking the dimethylolbutyric acid solution, adding water and a cosolvent, adding powdery zirconium carbonate and lithium hydroxide, carrying out a reaction, testing the metal content, and supplementing water or a cosolvent until the metal content is 3.5-4 wt% to obtain an intermediate product 3; and mixing the intermediate product 2 and the intermediate