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C5/C9 Copolymerization Petroleum Resin

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C5/C9 Copolymerized Petroleum resins is a series of C5 Hydrocarbon Resin modified C9 Hydrocarbon resin obtained from copolymerizing of C5 fraction and C9 fraction that derived from the by-product of thermal cracking of naphtha. It is a granular solid resin with the color range from light yellow to yellow. It is not a high polymer, but a low polymer with the molecular weight range of 300-3000. C5/C9 petroleum resin has the advantages both of C5 Hydrocarbon resin and C9 hydrocarbon  resin. It has the characteristics of low acid value, good miscibility, water, ethanol and chemical resistance, the chemical stability against acid, the good adjustment of viscosity and thermal stability, weather resistance and light aging resistance because of non-polar groups in its structure. C5/C9 hydrocarbon resin has good solubility in organic solvents especially in oil solvent, as well as good compatibility with other resins. It also has brittle, increasing viscosity, cohesiveness and plasticity. Generally, it is not used alone, but used as accelerant, regulator and modifier together with other resins in Adhesive, Rubber, Tire and Coating, etc.

Chemical properties:

 Items                                           C5/C9 Copolymerized Petroleum Hydrocarbon Resins
 Softening Point(R&B)        85-95                                  95-105       100-110           
 Color No.(50% Toluene)Ga.      4#          4#-11# 4#-11# 
 Acid Value (mgKOH/g) 0.50     0.50 0.50 
 Ash Content(%) 0.10    0.10 0.10 

C5/C9 Copolymerized Petroleum Resins can be used in hot melt adhesives, adhesives, rubber and tire fields especially in radial tire with the effects of not only increasing adhesion between particles but also improving adhesion between particles and cord; in hot melt adhesives, adhesives fields, C5/C9 can not only provide better initial cohesiveness, but can also be used like rosin resins to adjust and improve viscosity durability and strength of mixture of glue and resins.

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