C9 petroleum resin is an oil-soluble functional resin first developed by Japan in the 1960s. Petroleum resin is a solid or viscous liquid low-molecular, non-plastic polymer prepared by polymerization with the by-products C5 and C9 fractions of the cracking ethylene process as the main raw material. Its relative molecular mass is generally less than 2000. It has the characteristics of low acid value, good miscibility, low melting point, good adhesion, water resistance and chemical resistance. China C9 Resin has been widely used in road marking paint, ink, In rubber processing, adhesives and other fields, according to the monomer and molecular structure of the resin, it can be divided into aromatic petroleum resins, aliphatic petroleum resins and alicyclic petroleum resins.
Aromatic petroleum resin, also known as C9 petroleum resin, is obtained by polymerizing the above-mentioned ethylene by-product C9 distillate raw material, and its production raw material is mainly cracked C9 distillate oil by-product of ethylene plant, accounting for about 10% to 20% of ethylene production. The distillate has a complex composition and is rich in unsaturated hydrocarbons. DCPD, also known as dicyclopentadiene or dicyclopentadiene, is present in the C9 and C5 fractions by-products of ethylene, and usually accounts for 20-45% of its content. Because DCPD contains a lively methylene group and two conjugated double bonds, it has high reactivity, and can be copolymerized with a variety of olefins or participate in a variety of organic chemical reactions, making it useful in synthetic rubber, resin, medicine, coatings, fuels, plasticizing It has a wide range of uses such as agents. Aromatic resin polymerized with high-concentration DCPD as the main raw material is often referred to as DCPD petroleum resin. It has been widely used in papermaking, packaging, printing, rubber and other industries at home and abroad.