The main classification of petroleum resin

Petroleum resin is a kind of resin with low molecular weight. The molecular weight is generally lower than 2000. It has thermal ductility and can dissolve solvents, especially crude oil-based organic solvents. It has good compatibility with other resins. It has high-quality abrasion resistance and aging resistance. Its key performance parameters include softening point, color, unsaturation, acid value, saponification value, relative density and so on. Softening point is the most important characteristic of petroleum resin. It means that the strength, brittleness and viscosity of petroleum resin are different depending on the main purpose of petroleum resin, and the required softening point is also different. Under normal conditions, the softening point of petroleum resin used in the industrial production of vulcanized rubber is 70℃～1000℃, and the softening point of petroleum resin used in the industrial production of paint and paint is 100℃～1200℃. Color is another key characteristic index value of petroleum resin. Light color is used for paint and coating industry, neutral color is used for packaging and printing industry production, and dark brown is used for rubber additives.

In addition, the level of color conversion caused by ultraviolet light and thermal effects is also a very important performance parameter. The acid value can not only be used to detect the storage capacity of acid-base metal catalysts, but also can be used to detect the storage of petroleum resins due to their oxidation. The resulting carbonyl and carboxyl components.

   The composition of petroleum resin is extremely complicated. With the marketing and promotion of main purposes, there are more and more types. Only a British manufacturer can produce more than 700 types.

According to the difference of the commonly used raw materials, it can be divided into five categories:

   ① Body fat and alicyclic resins are generally prepared from C5 fractions, also known as C5 resins;

   ②P-xylene resin, generally prepared from C9 fraction, also known as C9 resin;

   ③ p-xylene-aliphatic hydrocarbon copolymer resin, also known as C5/C9 resin;

   ④Dicyclopentadiene resin, made from dicyclopentadiene or its compounds, is also known as DCPD resin, because this resin has unsaturated aliphatic hydrocarbon groups, also known as reflective resin.

   ⑤ Hydrocracking petroleum resin, generally C5 or C9 resin is brownish red to light yellow, after hydrocracking, it can become milky white or translucent. The application of petroleum resin in hot melt adhesive and adhesive products, the resin is completely transparent It is very important. Hydrocracking can also improve the adhesion, aging resistance, reliability and compatibility of the resin.

Petroleum resin is mainly used in architectural coatings, adhesives, ink printing, preservatives, and vulcanized rubber modified materials. With the continuous development trend of petroleum resin technology, its main uses are also constantly developing. C5 resin is a kind of petroleum resin with a faster development trend at this stage. It is widely used in architectural coatings, printing inks, sealing, bonding and other industries. C9 resin is widely used in paint, vulcanized rubber, plastic and other industries, and its development and design market prospects are very broad.

   C5/C9 petroleum resin is a petroleum resin that has been put on the market in recent years, and it is more commonly used. Because of its unsaturated aliphatic hydrocarbon group, DCPD resin is widely used as a modified material of petroleum resin. Hydrocracked petroleum resin is widely used in hot melt adhesives and adhesives for environmental sanitation products because of its light color and tastelessness.