Stearate amide
[summary]
Stearate amide belongs to fatty bisamide compound, widely used in plastics, rubber, chemical fiber, coating and other synthetic materials important additives, its unique chemical structure can not only significantly improve the processing performance of polymer resin, but also to a certain extent can give products good application performance. EBS has the characteristics of high temperature lubricity and low temperature anti-viscosity, which solves these two problems often encountered in the processing of thermoplastic engineering plastics. Such AS ABS, AS resin processing, are a large number of use of this lubricant, therefore, lubricant EBS synthesis and application development, for promoting the development of China's synthetic materials processing industry will play a positive role.
[abstract]
As early as in the early 1960s, foreign countries began the industrial production of EBS. At present, there are dozens of commodity brands mainly composed of EBS, and the total output and consumption in the world are still increasing year by year. In the early 1980s, based on the rapid development of domestic PVC hard products processing industry, the demand for high-performance lubricants is more urgent, so the development of fatty acid bisamide additives varieties began to be paid attention to, but at present, the development of fatty acid bisamide additives varieties in China, the supply capacity is still unable to meet the needs of the market. The main problem is that the number of varieties is small, the product quality is not high, it is difficult to meet the plastic processing industry, especially the engineering thermoplastic resin processing of special, efficient requirements.
[Production]
Stearic acid and ethylenediamine were directly condensed and dehydrated under the action of catalyst to obtain ethylenedistearamide. The process process of this method is short, but the reaction temperature is high, generally above 200 ℃, and appropriate catalysts and stabilizers need to be selected to ensure that materials are not oxidized during the synthesis process and product chroma. This method is the main method for the synthesis of EBS at present. The main production enterprises of EBS in China adopt this method for production. Its production process mainly includes synthesis, granulation, screening and packaging four processes. At present domestic most EBS manufacturers post-processing granulation process mainly adopts the crushing, screening process, this process not only complex process, operating conditions, product color deepens, more important is the product is of structure of polyhedron, dry illiquid, easier to produce in the container in the process of application of bridging phenomenon, blocking equipment and piping, Affect the normal operation of ABS resin device.
[usage]
Because of its unique structure, EBS is widely used in plastic processing, rubber processing, metal processing and petroleum products.
1. In the plastic processing industry, EBS is mainly used as lubricating release agent, smooth agent, pigment dispersant and auxiliary stabilizer. On the other hand, EBS can migrate from the inside of the resin melt to the surface, reducing the friction between the resin particles and between the resin melt and the processing equipment, preventing it from sticking to the metal surface and playing an external lubrication role.
2. When EBS is used with semi-blocked phenolic antioxidants, the stability of polyolefin filled with inorganic fillers can be significantly improved. EBS can have a strong affinity with inorganic fillers or pigments, making them adhere to the surface of particles, while the long carbon chain groups are compatible with the resin, so it can improve the dispersity of pigments
3, in rubber processing, EBS can be used as rubber lubricant, anti-adhesive, release agent, filler surface modifier and hard rubber surface treatment agent, its outstanding performance is to improve the surface gloss of rubber plate, hose and other products, play the role of surface gloss agent.
4, when drawing wire, using EBS can improve the speed of drawing, prolong the life of the metal mold, and improve the surface smoothness of the wire. In addition, in the powder metallurgy molding, before the metal melting, first to EBS bonding, and EBS as a lubricant of the metal mold, can reduce the wear of the metal mold, EBS is used in the powder metal molding process of various metal parts.
"Development"
Because of its unique performance, EBS has been widely used in plastic processing and other aspects. At present, the production capacity and output of EBS in China cannot meet the needs of actual production, so it has to be imported in large quantities every year and has broad prospects for development. In the future, the relevant domestic enterprises should strengthen the research of technology and production management, improve the quality of products and increase the market share. In addition, further application research should be carried out to expand the new application fields of EBS, so as to promote the development of engineering plastics and polymer alloys in China.
