Coupling agents are organosilicon compounds with special structures. In their molecules, they have reactive groups that can combine with inorganic materials (such as glass, cement, metal, etc.) and reactive groups that can combine with organic materials (such as synthetic resin). The commonly used theories include chemical bond theory, surface wetting theory, deformation layer theory, and confinement layer theory. Silane coupling agent is used as surface modifiers to improve the dispersibility and adhesion of inorganic fillers in plastics.
Silane coupling agent was originally developed as the glass fiber-reinforced plastic sizing agent. Since silane coupling agent improves the adhesion between glass fibers and resin, the mechanical properties of reinforced plastics are significantly improved.
With the rapid development of composite materials, the varieties and production of silane coupling agent are also developing rapidly. In recent years, by introducing specific functional groups into some materials using the silane coupling agent, the surface properties of materials can be improved, such as antistatic, antifungal, deodorant, anticoagulant, and physiological compatibility, which opens up new applications of silane coupling agents.
Due to the development of many important application fields, silane coupling agent has become an important branch of organosilicon.
The attributes of silane coupling agents have long been applied in fiberglass-reinforced plastics (FRP) as sizing agents for the surface treatment of glass fibers. This significantly improves the mechanical properties, electrical properties, and aging resistance of FRP, and the importance of silane coupling agents in the fiberglass industry has long been recognized.
One functional group can combine with the skeleton material to be adhered; the other functional group can combine with the polymer material or adhesive, thereby forming higher chemical bonds at the bonding interface, which greatly improves the bonding strength.
As a surface treatment agent for the skeleton material;
Added to the adhesive;
Directly added to the polymer material.
From the perspective of fully utilizing its efficiency and reducing costs, the first two methods are better.
SiSiB SILICONES is one of the leading manufacturers in the organosilicon industry, focusing on the development and manufacture of silanes and organosilicones.
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