Liquid antioxidant composition for C5 petroleum resins

Abstract

The invention relates to a liquid antioxidant composition for C5 petroleum resins, wherein the liquid antioxidant composition comprises, by weight, 30-80 parts of a hindered phenol antioxidant, 10-40parts of a hindered amine light stabilizer, 0-30 parts of a phosphite antioxidant, and 0-30 parts of a thioester antioxidant. According to the present invention, the antioxidant is added during the production of the C5 petroleum resin, and accounts for 0.1-1.0% of the weight of the C5 petroleum resin; and the composition is a liquid product, can directly replace the existing antioxidant system without the modification in the process, has significant anti-oxidation effect compared with the existing antioxidant system, and easily helps the industrial production.

Description

technical field [0001] The invention belongs to the technical field of polymer material functional additives, in particular to a liquid antioxidant composition, and also relates to the application of the composition in C5 petroleum resin. Background technique [0002] The C5 fraction is a by-product of ethylene production units, accounting for about 10%-15% of ethylene production. C5 petroleum resin is a functional resin obtained by polymerizing the C5 fraction of by-products of ethylene cracking as a raw material, with a molecular weight of 300-3000. C5 petroleum resin has the characteristics of low acid value, good miscibility, water resistance, ethanol resistance, chemical corrosion resistance, good thermal stability, good compatibility with organic matter, and has the function of adjusting viscosity. It is widely used in rubber, Adhesives, coatings, traffic paints, inks, paper and other industries. [0003] However, C5 resin is prone to thermo-oxidative aging during pr...

AI Technical Summary

Problems solved by technology

[0005] However, the currently used formulations are all powder antioxidants, so the following problems will occur during the addition process: (1) Intermittent addition of powder antioxidants requires long-term stirring and mixing due to the problem of mass transfer between solids and liquids. The material processing time is long; (2) powder antioxidants are usually poured into the upper opening, and the operation process is dusty, which affects the health of workers; (3) the powder is easy to adhere to the wall of the kettle, and it will accumulate heat for a long time. Carbon, which increases the risk of black spots in the resin

In order to solve this problem, some resin manufacturers adopt the method of adding the antioxidant after melting. Although the problem of continuous production is solved, the energy consumption required for the melting of the antioxidant is large, which increases the production cost and is resistant to Discoloration usually occurs after the oxygen agent is melted, which affects the color of the final resin product