C5/C9 Petroleum Resin
HYDROCARBON RESINS (C5 AND C9 RESINS)
Hydrocarbon resins are amorphous thermoplastic polymers produced by polymerization of unsaturated hydrocarbons. The feedstock are various by-products of naphtha crackers. They are sometimes hydrogenated to reduce discoloration and to improve their heat and UV stability.
At present C5 Petroleum resins, industrially known as C5 Aliphatic Hydrocarbon Resins and C5 Hydrocarbon Resins, is gradually playing a more important role as Tackifying resins in the adhesive and sealant industry, especially in the application of hot melt adhesive and pressure sensitive adhesive. They are available in a wide range of molecular weights (MW) and softening points (solid grades 85 – 115°C) and provide outstanding tack. They also have a light yellow to light brown color and possess excellent heat stability.
C9 petroleum resin is produced through the process of fractionation, thermal polymerization, flash evaporation and molding with the carbon nine as the raw material from ethylene fragmentation. C9 has good transparency, gloss, compatibility, insulation, excellent solubility, and stability to acid-based chemicals as well as good bond and good thermal conductivity. Compared to C5 resins, they have a much higher melt viscosity, are of darker color (dark yellow to brown) and have higher softening point ranging from about 100 to 150°C. Moreover, C9 resins are very versatile resins that are compatible with many polymers.
Rubber processing: Used for the roles of softening, strengthening and increasing viscosity to enhance molding processing performance and prevent delaminating, bubbles in the product. It is mainly used in the production of tires, rubber V-belts, and tubes.
Adhesive production: Used in the production of hot melt adhesives and pressure sensing adhesive to significantly increase its viscosity, elasticity, and low temperature performance. It has excellent performance of water resistance and is often used in plywood, wallpaper and leather bonding.
Paint production: Used in the manufacture of the reinforced latex and oil-soluble paints, with the function of effectively improving paint glossiness, hardness, water resistance, and chemical resistance.
Ink production: Suitable for use in the production of printing inks due to its high softening point, stable performance, and solubility in hydrocarbon resins. The addition of petroleum resins to inks allow for increased drying speeds, enhanced coloring and brightening properties that significantly impact overall print performance.
Paper industry: Used as a paper sizing agent. Compared to traditional rosins, C9 is very effective in reducing water absorption that allows for increased paper smoothness and improved hydrophobic properties.
Other applications: C9 can be used as a water treatment agent with drilling mud additives for oilfield chemicals, or as an asphalt modification agent.