High-quality easy-to-store ink resin and preparation method thereof

The invention discloses high-quality easy-to-store ink resin and a preparation method thereof, and belongs to the technical field of printing materials. The ink resin is prepared from the following raw materials in percentage by mass: 39.2 percent to 46.7 percent of rosin, 1.6 percent to 2.4 percent of maleic anhydride, 28.7 percent to 36.4 percent of alkylphenol, 3.3 percent to 4.3 percent of oleic acid, 6.3 percent to 7.6 percent of glycerol, metal oxide and polypropylene glycol 400. The polypropylene glycol 400 accounts for 3.5%-4% of the mass of the rosin; the oleic acid and the polypropylene glycol 400 are added into the raw materials, so that the amount of free COOH and OH in a resin product is reduced, the water resistance of the resin is improved, the continuous viscosity increase of the resin caused by dark esterification reaction is reduced, the straight-chain structure of the resin is increased, the wetting dispersity of the pigment is improved, and the problem of pigment sedimentation is s