What is hydrogenated petroleum resin?

Hydrogenated petroleum resin is a thermoplastic resin mainly produced from C5 and C9 fractions produced by petroleum cracking through pretreatment, polymerization, distillation and other processes. It is not a high polymer, but an oligomer with a molecular weight between 300-3000. Subsequently, this petroleum resin undergoes hydrogenation reaction to convert unsaturated hydrocarbons into saturated hydrocarbons, thereby improving the color, odor, and weather resistance of the resin.

According to the different main raw materials and processes, hydrogenated petroleum resins can be divided into the following categories:

1. C5 hydrogenated petroleum resin:

Raw materials: C5 fraction from ethylene cracking is the main raw material.
Process: It is formed by cationic polymerization of diene and monoene in C5 component.

Characteristics: It has good adhesion, compatibility, thermal stability, and photostability, and can improve the bonding performance of adhesive.

Application: Widely used in industries such as hot melt adhesive, pressure-sensitive adhesive, structure and decoration in the construction industry, automotive assembly, tires, product packaging, book binding, hygiene products, footwear, hot-melt road marking paint, colored asphalt, etc. As a paint additive, it can accelerate the drying speed of the paint film, improve the water resistance, acid and alkali resistance, aging resistance, surface hardness and gloss of the paint. Used for fusion type road marking paint, it has the characteristics of fast drying speed, strong adhesion, durability, weather resistance, good thermal stability, and solvent-free.

2. C9 hydrogenated petroleum resin:

Raw materials: The main raw material is cracked C9 fraction.
Process: Water white resin produced by polymerization in the presence of a catalyst or co polymerization with aldehydes, aromatic hydrocarbons, and terpenes.
Characteristics: It has excellent aging resistance, increased viscosity, water resistance, acid and alkali resistance, weather resistance, and good compatibility with polymers such as EVA, SBS, SIS, SEBS, etc. It also has brittleness, increased viscosity, adhesiveness, and plasticity.

Application: Mainly used in paint coatings, rubber additives, paper additives, inks, adhesives and other application fields.

3. DCPD hydrogenated petroleum resin:

Raw material: Dicyclopentadiene (DCPD) is the main raw material.
Process: Water white tackifying resin prepared by polymerization and hydrogenation.
Characteristics: It has good viscosity, compatibility, thermal stability, and photostability, good compatibility with ester and polyurethane solvents, good compatibility with epoxy resins, and good curing speed. It can be used as a modifier to reduce the polymerization strength of epoxy resin, improve the adhesion of coatings and the shrinkage strength of cement and steel, and improve the leveling of coatings. Adding high softening point resin to ink can achieve color development, fast drying, brightening effects, and improve printing performance.
Application: Widely used in rubber, adhesives, printing inks, high-end coatings, hot melt adhesives and other fields.
In addition, hydrogenated petroleum resin also has the following characteristics:
1. Appearance and Form: Present as white to light yellow solid particles or flakes, with a density ranging from 0.95-1.01g/cm ³ and a melt viscosity of ≤ 400mPa · s at 190 ℃.
2. Core features: improved heat aging resistance, low chromaticity (iron cobalt color code), excellent compatibility with high polymer materials such as SBS/SIS/EVA.
3. Safety: Due to its composition and properties, hydrogenated resin is classified as a general chemical and not a hazardous material.
Overall, hydrogenated petroleum resin is an excellent thermoplastic resin with a wide range of applications in various fields.