Carbon Nine Petroleum Resin is a thermoplastic resin obtained by splitting the by-product carbon nine distillate of ethylene plant into main raw materials,Petroleum Resin polymerizing it in the presence of a catalyst,Petroleum Resin or copolymerizing it with aldehydes, aromatic hydrocarbons, terpenes. Its molecular mass is generally less than 2000,Petroleum Resin softening point is less than 150 ℃, it is a thermoplastic viscous liquid or solid. Due to its low softening point and relatively small molecular weight,Petroleum Resin it is generally not used alone as a material. Because the structure of carbon nine petroleum resin does not contain polar groups, it has good water resistance, acid and alkali resistance, weather resistance and light aging resistance,Petroleum Resin good solubility in organic solvents, and good compatibility with other resins It also has brittleness, tackiness,Petroleum Resin adhesion and plasticity, and is mainly used in the fields of coatings, rubber additives,Petroleum Resin paper additives,Petroleum Resin inks and adhesives, and has a large market demand.
The raw material of petroleum resin cracked carbon nine fraction is a complex mixture of more than 150 kinds of aromatic hydrocarbon components with a boiling point in the range of 240 ℃, without a fixed composition,Petroleum Resin and it is very dispersed and not easy to separate. From the perspective of synthesis,Petroleum Resin it can be divided into two categories. One type of active components that can be polymerized, such as: styrene and vinyl toluene, dicyclopentadiene,Petroleum Resin etc.; another type of inactive components, such as alkylbenzene and fused ring aromatic hydrocarbons, etc.Petroleum Resin act as solvents during polymerization After the reaction is distilled. Carbon nine raw materials generally contain about 50% of polymerizable monomers.
Common methods for synthesizing petroleum resins are thermal polymerization, catalytic polymerization,Petroleum Resin and free radical polymerization. Among the many physical and chemical properties of petroleum resin, the most important is the softening point and hue. The softening point is required to be 50-140°C, the hue is less than l3,Petroleum Resin and light yellow to dark brown. The polymerization method of carbon nine fraction has a great influence on the hue and softening point of carbon nine petroleum resin.
