Difference between C9 resin and C5 resin

Difference between C9 resin and C5 resin


Petroleum resin is a thermoplastic produced from C5/C9 fraction, a byproduct of petroleum cracking, through pre-treatment, polymerization, distillation, and other processes.

Petroleum resin has the characteristics of good viscosity regulation and thermal stability, and its main function is to provide viscosity increasing and wetting effects. Petroleum resins are generally not used solely as a promoter, regulator, modifier, and other resins.

Petroleum resin is divided into C5 petroleum, C9 petroleum resin, C5/C9 copolymer petroleum resin and hydrogenated petroleum resin. Different types of petroleum resins have certain interchangeability, and in some cases it can be replaced each other, but they also have their own uniqueness in various application fields.

C5 petroleum resin: low softening point, light color, low Degree of unsaturation, good compatibility with other resins, rubber, etc; Mainly used in pressure sensitive adhesives
Hot-melt adhesive, road marking paint, synthetic rubber, radial tire and other fields are also used in paint, ink and other fields.

C9 petroleum resin: high softening point, dark color, high Degree of unsaturation, good weather resistance, poor compatibility with rubber, SIS, etc; Main applications
It is also used in paint, ink, Hot-melt adhesive, road marking paint, rubber and other fields.
Thermopolymerization resin is mainly used in industries such as adhesives, rubber, and radial tires.
Cold polymerization is mainly used for paints, inks, adhesives, the price of cold polymerization is generally higher than that of hot polymerization.

C5/C9 copolymer petroleum resin: It combines the characteristics of C5/C9 petroleum resin, has a relatively high softening point and good compatibility; Mainly used for thermal Melt rubber, synthetic rubber, tires, and other fields.

Hydrogenated petroleum resin: low Degree of unsaturation, colorless, no special smell, good weather resistance, stability and compatibility; Mainly used in high-end coatings Materials, color ink, adhesives, road marking paint and other industries.

In conclusion, C5 petroleum resin has low softening point, low odor and high adhesion, and is mainly used in pressure sensitive adhesive, Hot-melt adhesive, road marking paint and other fields; C9 petroleum resin has a relatively large odor, high softening point, and poor compatibility, mainly used in fields such as paint, ink, and anti-corrosion coatings; Petroleum resin modified by hydrogenation saturates the original double bonds and benzene ring, and removes residual halides, sulfur, and nitrogen from the resin during polymerization Impurities. It can become white or transparent after hydrogenation. Transparency is very important in applications such as Hot-melt adhesive, adhesive and PP film modifier. In addition, Hydrogenation resin can also improve adhesion, weather resistance and compatibility of EVA used for Hot-melt adhesive. Therefore, hydrogenated petroleum resin is widely used in Hot-melt adhesive and urine adhesives for fabrics and hygiene products, new coatings, inks, highway road marking paints, and other fields.

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