Views: 8 Author: su Publish Time: 2018-08-17 Origin: Site
Development status of polyetheramine products, synthesis methods and applications in various fields
Polyetheramine In the 1960s, Jefferson of the United States invented the product and officially industrialized it in the early 1970s. After that, Texaco (now Huntsman) continued to develop new products and promote the market. The excellent properties of ether amines are gradually accepted by the market. Become a popular high performance composite. The largest producer in the world today is Huntsman in the United States, and BASF is the second largest producer, both of which account for more than 90% of the market. It reflects the importance of the product for many important application areas. The synthesis process of polyetheramine includes two processes, batch process and continuous process. The production process adopted by Huntsman is continuous fixed bed process, using metal catalyst supported on carrier, the production equipment and process are advanced, and the catalyst efficiency is high, so the product The conversion rate is high, the side reaction is small, the production cost is low, and the performance is stable, but the equipment investment is huge. Compared with continuous production, the intermittent process equipment investment is small, and it is convenient to switch different product types, but the production efficiency is low and the cost is high. At the same time, there is a certain gap between the product quality and the continuous method.
Polyetheramine (PEA): A type of polymer in which the main chain is a polyether structure and the terminal reactive functional group is an amine group. The amino terminated polyether has the following structure: x, y = 0 - n. Polyetheramines are obtained by amination of polyethylene glycol, polypropylene glycol or ethylene glycol/propylene glycol copolymers under high temperature and pressure. By selecting different polyoxyalkylene structures, a series of properties such as reactivity, toughness, viscosity, and hydrophilicity of the polyetheramine can be adjusted, and the amine group provides the possibility of reacting the polyetheramine with various compounds. Its special molecular structure gives the polyetheramine excellent overall properties. Currently commercial polyetheramines include monofunctional, difunctional, trifunctional, and a range of products with molecular weights ranging from 230 to 5,000. It has been widely used in many fields such as polyurea spraying, large composite materials, epoxy resin curing agents and automotive gasoline detergents. Main application areas: high-performance composite materials: polyetheramine can be used as a high-performance curing agent for epoxy resin, used to produce high-strength, high-toughness composite materials; polyurea: as a key component of polyurea materials, in high-speed rail Waterproof systems for concrete structures such as bridges, sea-crossing bridges, dams, and large stadiums have many application examples and have shown excellent performance. Coatings: have low viscosity and can be used when used in epoxy floors or anti-corrosion coatings. Solvent dosage, reduce system viscosity; Adhesive: As epoxy resin curing agent, it has excellent toughness and fatigue resistance after fully curing, widely used in adhesives and structural adhesives; Jewelry: has extremely shallow color And better yellowing resistance, can be used in jewelry manufacturing. Gasoline detergent: It has excellent clean, disperse, demulsification, corrosion inhibition and anti-oxidation properties. It can suppress the formation of deposits in automobile injectors, intake valves and combustion chambers. Compared with the polyisobutylene amine type gasoline detergent, it not only does not generate sediment itself, but also removes the original CCD (the engine combustion chamber forms sediment)