III. Composite Materials Field

Aerospace Composite Materials

The aerospace field has extremely stringent requirements for the performance of materials, which need to possess characteristics such as high strength, low density, and high temperature resistance. Epoxy resin-based composites paired with aromatic amine curing agents, such as 4,4'-diaminodiphenylmethane (DDM), etc., have become the ideal choice for manufacturing structural components of aircraft, such as wings and fuselages. The cured product formed by the reaction between the aromatic amine curing agent and the epoxy resin has a relatively high glass transition temperature (Tg) and excellent mechanical properties, and can maintain structural stability under extreme conditions such as high temperatures and high stresses. For example, when the aircraft wing is manufactured using a composite material system of epoxy resin - DDM curing agent, it can effectively reduce the weight of the wing, improve flight efficiency, and at the same time ensure the structural integrity and safety under complex meteorological conditions at high altitudes.

Sports Goods Manufacturing

Epoxy resin curing agents also play an important role in sports goods manufacturing. Take the golf club as an example. Its shaft is usually made of carbon fiber-reinforced epoxy resin composite materials. By selecting a suitable curing agent, such as cycloaliphatic amine curing agents, the epoxy resin can be closely combined with the carbon fiber, endowing the golf club with good strength and flexibility. The product cured by the cycloaliphatic amine curing agent has relatively high hardness and wear resistance, which can meet the high impact force and repeated bending stress that the golf club bears during the process of hitting the ball. At the same time, it ensures the lightweight design of the golf club, enhancing the athlete's using experience and competitive performance. In addition, in the manufacturing of sports goods such as tennis rackets and bicycle frames, epoxy resin curing agents are also used to optimize the performance of composite materials and improve product quality.

IV. Construction and Civil Engineering Field

Reinforcement of Concrete Structures

With the increase in the service life of buildings or due to the needs of structural renovation, etc., the reinforcement of concrete structures has become an important measure to ensure building safety. Epoxy resin structural adhesives paired with curing agents, such as modified amine curing agents, are widely used in the reinforcement of concrete structures. The modified amine curing agent can enhance the bonding strength between the epoxy resin structural adhesive and the concrete, and form a firm bonding layer after curing, effectively transmitting stress. For example, in the processes of steel bonding reinforcement and carbon fiber cloth reinforcement of concrete beams and columns, using the structural adhesive of the epoxy resin - modified amine curing agent system can significantly improve the bearing capacity and seismic performance of the concrete structure and extend the service life of the building.

Building Sealing and Bonding

In building construction, reliable sealing and bonding materials are required for links such as door and window sealing and ceramic tile pasting. Epoxy resin sealants and adhesives paired with suitable curing agents, such as polyetheramine curing agents, can meet these needs. The polyetheramine curing agent has good flexibility and weather resistance. The sealants and adhesives formed after the reaction with the epoxy resin can not only ensure good bonding strength but also adapt to the expansion and contraction deformation of building materials caused by temperature changes, humidity changes, etc., preventing sealing failure and bonding detachment. For example, in the sealing treatment of building doors and windows, using the sealant of the epoxy resin - polyetheramine curing agent system can effectively block the intrusion of rainwater and sandstorms and improve the sound insulation and heat insulation performance of the doors and windows; in ceramic tile pasting, the adhesive of this system can ensure that the ceramic tiles are firmly pasted on the wall or floor, avoiding problems such as ceramic tile hollowness and detachment.