Hydrocarbon Resin C9 is a kind of thermal plasticizing resin produced by C9 Fraction,by-products of Petroleum cracking,through pretreatment and distillation.It is not a high polymer but a low polymer with the molecular weight between 300-3000.Featured by Acid Value,easy mutual solubility,resistant to water,resitant to ethanol and chemicals,it has the chemical stabilizing property to acid and alkline,viscosity adjusting and thermal stanlizing.Generally,Petroleum Resins are not used independently but have to used together with other kinds of resins as promoters,adjusting agents and modifiers in Paint,Ink,Hot Melt Adhesive,Rubber,Tyre,Coat and other related fields.