C5 petroleum resin production process
An aliphatic C5 petroleum resin can be prepared by using an alkene mixture containing a large amount of piperylene in a C5 fraction as a raw material, and the main processes in the production process include cationic catalysis and polymerization. The mixture of dicyclopentadiene mainly contained in the C5 fraction can be used as a raw material to prepare an alicyclic C5 petroleum resin, and the production process mainly employs a thermal polymerization technique. Among them, the aliphatic C5 petroleum resin has attracted much attention due to its excellent properties such as light color, fluidity, good adhesion, and anti-aging.
The catalytic polymerization process for producing an aliphatic C5 petroleum resin by using a cation for catalysis and then repolymerizing to process a fraction is a common process technology. The technical process of this process mainly has the following steps: pretreatment-polymerization-catalyst deactivation-removal of reactants, and the addition of a catalyst during the process can effectively fuse a large number of organic compounds such as phenol, ether, aldehyde, etc., and can also Its catalytic activity is enhanced. The advantage of this process is that the various reactions involved are fast and can be carried out without too high a temperature. However, the disadvantage is that it will cause a large amount of waste water to pollute the environment.
The alicyclic C5 petroleum resin obtained by processing the fraction by a thermal polymerization process has different characteristics from the catalytic polymerization process. This process is simple and cost-effective, and does not require the use of a catalyst during production and processing, but requires conditions such as higher pressure and higher temperature. The reason why this process technology has not been widely used is mainly because the petroleum resin obtained by this process has a darker color, and the light-colored petroleum resin which is not obtained by the catalytic polymerization process is good.
Relevant scholars have continuously studied the advantages and disadvantages of both, such as finding and developing more effective catalysts, optimizing the catalytic process, forming a composite catalytic system, etc., improving the chroma, solubility, and softening point of C5 petroleum resin. Reduce environmental pollution and expand its range of applications.
Modification of C5 petroleum resin
01 | Hydrogenation modification
Hydrogenation modification is mainly to introduce hydrogen into the process of mixing the resin and the solvent during the production process, and to form a hydrogenated petroleum resin after cooling. Hydrogen can be produced under the action of the catalyst in the production, so that hydrogen can be recycled and the reaction speed can be accelerated. The hydrogenated petroleum resin obtained by adding hydrogen has a good color to make it discolored or transparent, which effectively improves the phenomenon that the petroleum resin exhibits a dark color such as yellowish brown due to the incorporation of other impurities. This is more advantageous for its use in hot melt adhesives and tapes.
02 | Chemical modification
Chemical modification of petroleum resins can be achieved by introducing polar groups. Due to the low softening point of C5 petroleum resin, many scholars have studied and improved the softening point of petroleum resin by various methods. For example, adding a certain amount of isoamylene to the raw material can make the softening point of petroleum resin Improve the use of maleic anhydride and initiator to improve C5 petroleum resin to obtain diesel flow improver; and use dicyclopentadiene with multiple double bonds, high softening point and narrow molecular mass to carry out compounds such as aromatic hydrocarbons, phenols and alcohols. Polymerization to produce a variety of properties of the resin, making petroleum resin more widely used.
Application of C5 petroleum resin
C5 petroleum resin can be divided into mixed C5 petroleum resin, aliphatic C5 petroleum resin, dicyclopentadiene aliphatic C5 petroleum resin, copolymer resin, hydrogenated petroleum resin, etc. according to different raw materials. Petroleum resin is added to various chemical industries. The production of the product.
01 | Application in adhesives
In the production of hot melt adhesives and pressure sensitive adhesives, it is necessary to use a binder, and the addition of C5 petroleum resin to the binder can greatly increase the viscosity of the binder, such as C5 hydrogenated petroleum resin because of its strong peeling viscosity. The combination of rosin resin and terpene resin is gradually replaced by the characteristics of better fast viscosity and low price, and the cost is reduced, so that it is increasingly used in pressure-sensitive adhesive tapes and medicinal adhesives.
02 | Application in road marking paint
Hot-melt road marking paints are mainly used in the use of road marking paints, which are popular road marking paints because of their low cost, fast drying, good durability, no solvent and wide application. The hot-melt road sign is mainly made by mixing glass beads, pigments, inorganic fillers, plasticizers and thermoplastic resins, because the addition of petroleum resin makes the road marking paint have great thermal stability, durability and weather resistance. Improvement, effectively improving the performance of road marking lacquer.
03 | Application in synthetic rubber
The application of hydrogenated petroleum resin and piperylene petroleum resin in rubber processing and production in China is particularly large. Adding C5 petroleum resin as a tackifier to the production of rubber products can effectively improve the strength and formability of rubber and improve the quality of rubber. In particular, the use of its small interference to vulcanization in the production of butyl rubber inner tube can effectively extend the service life of the butyl inner tube.
04 | Application in the paper industry
The sizing agent used in the papermaking process can be replaced by a rosin resin from C5 petroleum resin. Paper made from a sizing agent added with petroleum resin is not suitable for air bubbles, and is relatively smooth and easy to print. However, when a sizing agent is prepared from a petroleum resin, maleic anhydride is added, and a carboxyl group is introduced by an addition reaction to achieve the purpose of modifying it.
C5 petroleum resin has been widely used in rubber, adhesive, road marking paint, papermaking and other industrial fields. Therefore, it is necessary to conduct in-depth research on the production process of C5 petroleum resin, innovate production methods, and develop more petroleum resin extension products. Applied to a wider range of industry production.