The Category of Epoxy Resin Bonding Agent

Epoxy resin bonding agent is the highest quality structural glue. With the recent improvement of the requirements for construction safety, more and more people are becoming aware of epoxy resin bonding agent. China-made epoxy resin bonding agent used in spacecraft has garnered attention both domestically and abroad. Specialists have made an analysis of the category of resin bonding agent.

The cabin, floor, antenna, solar cells, and instrument bay of the "Shenzhou" spacecraft have to be bonded together under ultra high and low temperature changes and able to withstand strong impacts. To live up to this purpose, a structural bonding agent with the best performance, the epoxy resin bonding agent, should be used. During the application process, based on the processing technology and application requirements, the epoxy resin bonding agent can reflect with an epoxy curing agent to complete the solidification and conclude the bonding function.

Epoxy resin structural bonding agent refers to adhesive force structure, in which the glue joint is superior to traditional bonding agents such as a riveting connection, bolt connection, or welding connection. People first began using the synthetic adhesive force structure in the 1940s. At that time, the developing demand of modern industries, especially the aerospace industry and other military industries, boosted the rapid growth of the bonding agent. Epoxy resin glue is an important type.

Based on curing temperature, epoxy resin structural bonding agents can be classified into four categories: high temperature curing, middle temperature curing, room temperature curing, and low temperature curing. The high temperature curing epoxy resin bonding agent is able to withstand high temperature, and is high in toughness and thermal stability, so it is frequently used in main force structural bonding. The middle temperature curing epoxy resin bonding agent is mainly used in the aircraft industry. Because aluminum alloy will show a grain boundary corrosion tendency when the temperature is over 120 °C and has the tendency to become tense with rising temperatures, the aluminum alloy's intensity and toughness will decline. So the curing condition temperature for bonding aluminum alloy should be kept at not more than 130°C/4h. Room temperature curing epoxy resin structural bonding agent is used in a wider number of fields, such as in the civil engineering and construction fields. The low temperature curing epoxy resin structural bonding agent is a newly developed type that can be curing under minus ten degrees centigrade to meet the low temperature construction demands in the winter.

These are some of the characteristics of epoxy structural bonding agent: high intensity and toughness, good comprehensive performance, high dependability, flexible formula, extensive choice, and high adaptability to all kinds of requirements. Epoxy structural bonding agent is widely used in the aerospace industry, such as honeycomb sandwich structures, all rubber sheet metal structures, composite metal structures (such as steel-aluminum, aluminum-magnetism, and steel-bronze), and metal-agglomeration composites structures. Besides that, it is also used in the wing skin and body wall plate, the satellite structure, and the rocket engine shell. In the shipbuilding industry, epoxy resin bonding agent is used as the cementing agent for the propeller and stern shaft. In the mechanical manufacturing industry, it is used as adhesive of heavy duty machine screws. In recent years, epoxy resin bonding agent has seen rapid development in civil construction. It is also widely used in the strengthening, adhesive, and amendment of houses, bridges, tunnels, dams, etc.

Author: Liwei Chu 
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