Epoxy resin adhesives have many advantages, what are they?

The epoxy bonding process is a complex chemical reaction process, including cooling, curing, and other steps, and finally generates a two-dimensional cross-linked structure of the solid, which combines the adherends into a complete epoxy adhesive.

It has the following advantages:

1. Epoxy resin contains a variety of polar groups and highly active epoxy groups, so it has strong adhesion to a variety of polar materials such as metal, glass, cement, wood, plastic, especially materials with high surface activity. At the same time, the cohesive strength of epoxy cured products is also very large, so its bonding strength is very high.

2. When epoxy resin is cured, basically no low molecular weight volatiles are produced.The volume shrinkage of the adhesive layer is small, about 1%-2%, which is one of the varieties with the smallest curing shrinkage among thermosetting resins.After adding fillers, it can be reduced to below 0.2%.The linear expansion coefficient of epoxy cured products is also very small. Therefore, the internal stress is small and the effect on the bonding strength is small.In addition, the creep of the epoxy cured material 50 is small, so the dimensional stability of the adhesive layer is good.

3. There are many varieties of epoxy resins, curing agents and modifiers. Through reasonable and ingenious formula design, the adhesive can have the required processability.And have the required performance.

4. It has good compatibility and reactivity with a variety of organic and inorganic substances, and is easy to be modified by copolymerization, cross-linking, blending, filling, etc. to improve the performance of the adhesive layer.

5. Good corrosion resistance and dielectric properties. Resistant to corrosion from most media such as acids, alkalis, salts, solvents, etc.

6. General-purpose epoxy resins, curing agents and additives are available in many varieties, from many places of origin, with large output, are easy to prepare, can also be contact-pressed, and can be used on a large scale.