C5/C9Copolymerized Hydrocarbon resins is a series of C5 Resin modifiedC9 resin obtained from copolymerizing of C5 fraction and C9fraction that derived from the by-product of thermal cracking ofnaphtha. It is a granular solid resin with the color range fromlight yellow to yellow. It is not a high polymer, but a low polymerwith the molecular weight range of 300-3000. C5/C9 petroleum resinhas the advantages both of C5 resin and C9 resin. It has thecharacteristics of low acid value, good miscibility, water, ethanoland chemical resistance, the chemical stability against acid, thegood adjustment of viscosity and thermal stability, weatherresistance and light aging resistance because of non-polar groupsin its structure. C5/C9 hydrocarbon resin has good solubility inorganic solvents especially in oil solvent, as well as goodcompatibility with other resins. It also has brittle, increasingviscosity, cohesiveness and plasticity. Generally, it is not usedalone, but used as accelerant, regulator and modifier together withother resins in Adhesive, Rubber, Tire and Coating, etc.
C5/C9 Copolymerized Petroleum Resins can be used in hot meltadhesives, adhesives, rubber and tire fields especially in radialtire with the effects of not only increasing adhesion betweenparticles but also improving adhesion between particles and cord;in hot melt adhesives, adhesives fields, C5/C9 can not only providebetter initial cohesiveness, but can also be used like rosin resinsto adjust and improve viscosity durability and strength of mixtureof glue and resins.