The difference between C9 and C5 petroleum resins

I believe that many friends will encounter such a question when purchasing petroleum resins: What is the difference between C9 and C5 petroleum resins? Well, the editor will help you distinguish them from three aspects. Please see below.

Chemical structure and source

C5 petroleum resin: It is polymerized by hydrocarbon compounds containing 5 carbon atoms (such as isoprene and isoprene), which are mainly non-aromatic hydrocarbons. Its chemical structure does not contain aromatic rings, so it belongs to aliphatic or alicyclic resins.
C9 petroleum resin: It is derived from olefins or cycloolefins containing 9 carbon atoms, including polymers of aromatic compounds. Therefore, it is also called aromatic petroleum resin, and its structure contains aromatic rings.

 

Physical properties

Color and morphology: C5 petroleum resin is usually lighter in color, light yellow to colorless and transparent; while C9 petroleum resin is darker in color, light yellow to light brown, transparent and shiny.
Softening point and melting point: C5 petroleum resin has a lower softening point, about 80 to 140 ° C; while C9 petroleum resin has a relatively high softening point.
Odor: C5 petroleum resin has a smaller odor, while C9 petroleum resin has a larger odor.

Performance and use

C5 petroleum resin: Due to its high adhesion, low odor, and light color, it is often used in applications that require high transparency and low odor, such as adhesives, pressure-sensitive adhesives, road marking coatings, synthetic rubber, radial tires, and some paints and inks. C5 petroleum resin has good compatibility with other resins, rubbers and other materials, and is easily dissolved in a variety of solvents, which makes it widely used in many fields.
C9 petroleum resin: Because it contains aromatic structures, it has good chemical resistance and weather resistance, but relatively low adhesion. It is suitable for occasions that require durability and corrosion resistance, such as paints, anti-corrosion coatings, etc. C9 petroleum resin shows good compatibility in specific solvents and materials, and is particularly suitable for formulations that require enhanced durability and special performance.

Summary

C5 and C9 petroleum resins have significant differences in chemical structure, physical properties, performance and use. The choice of which resin depends on the specific requirements of the final product, including factors such as color, adhesion, odor, durability and application environment.

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