Petroleum resin is a kind of thermal plasticity resin made of raw material, the byproduct of ethylene production plant, such as c9 aromatic hydrocarbon, heavy splitting diesel oil, heavy gasoline, c5 and other fraction through catalytic polymerization or thermo polymerization. Its appearance is light yellow to deep brown flake or grain, transparent and shiny, featured with acid value, easy mutual solubility, and resistance to water, ethanol and chemicals. It has chemical stability to acid and alkaline, with adjustable viscosity and thermal stability. The package is plastic compound bag. Petroleum resin can be used for producing adhesive, paints, rubber, paper sizing agent, etc.