Modified terpene-phenolic resin, preparation method thereof, and application thereof in tread rubber of tyres

The invention discloses a modified terpene-phenolic resin, a preparation method thereof, and an application thereof in tread rubber of tyres. The preparation method includes the following steps: 1) adding terpene-phenolic resin, a solvent and a catalyst into a reaction kettle and increasing the temperature to 70 DEG C, and dropwise adding an organic silicon modifier to carry out a reaction for 1-5 h; and 2) evaporating the solvent, increasing the temperature of the material liquid to 140 DEG C, adding an acidic catalyst and an unsaturated olefin modifier to carry out a reaction for 1-5 h to obtain anti-slippery resin, wherein the mass ratio of the terpene-phenolic resin, the organic silicon modifier to the unsaturated olefin modifier is 100:1-30:5-80. The modified terpene-phenolic resin is modified through organic silicon and alkylation, so that the resin is improved in anti-slippery and wear-resistant performances. When being used in rubber, the modified terpene-phenolic resin significantly improves the anti-slippery performance and safety of tyres. The preparation method has high production efficiency, is environment-friendly, and saves energy and reduces emission.