Rosin modified phenolic resin as well as preparation method and application thereof

The invention provides rosin modified phenolic resin as well as a preparation method and application thereof, the rosin modified phenolic resin is formed by polymerizing raw material components, and the raw material components comprise 1) at least one polyhydric alcohol; 2) at least one long-chain alkylphenol; 3) at least one aldehyde; 4) at least one alpha, beta-unsaturated binary acid or anhydride thereof; 5) abietic acid; and 6) at least one alkaline compound catalyst. The invention further provides a preparation method and application of the rosin modified phenolic resin. The rosin modified phenolic resin has a three-dimensional network mechanism with special molecular geometric configuration, topological entanglement of physical interaction and chemical crosslinking, and not only has high structure and high molecular weight, but also has self-gelling property and high resin solution viscosity. 本发明提供一种松香改性酚醛树脂及其制备方法和用途，所述松香改性酚醛树脂以原料组分聚合形成，所述原料组分包括1)至少一种多元醇；2)至少一种长链烷基酚；3)至少一种醛；4)至少一种α，β-不饱和二元酸或其酸酐；5)松香酸；6)