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Molecular synthesis and application of polyetheramine

Views: 160     Author: su     Publish Time: 2018-08-20      Origin: Site


Molecular synthesis and application of polyetheramine

Polyetheramine is a high performance composite material. Polyetheramine can be used as a high performance curing agent for epoxy resin to produce high strength and high toughness composite materials. As a key component of polyurea materials, it is used in high-speed rail bridges. Waterproof systems for concrete structures such as bridges, dams, large venues, etc. have many application examples and show excellent performance; as coatings: they have a lower viscosity and can be used when used in epoxy floors or anticorrosive 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. 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) is a type of polymer in which the main chain is a polyether structure and the terminal reactive functional group is an amine group. 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 comprehensive properties, and has been widely used in many fields such as polyurea spraying, large composite materials, epoxy resin curing agents and automotive gasoline detergents.


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