Application fields of silane coupling agents

（1） Surface treatment for glass fiber

It can improve the bonding performance between glass fiber and resin, greatly enhancing the strength, electrical, water resistance, weather resistance, and other properties of glass fiber reinforced composite materials. Even in wet conditions, its effect on improving the mechanical properties of composite materials is significant. At present, the use of silane coupling agents in glass fibers is quite common, accounting for about 50% of its total consumption. Among them, the most commonly used varieties are vinylsilane, aminosilane, methacryloyloxysilane, etc.

（2） Used for filling plastics with inorganic fillers

The filler can be surface treated in advance or directly added to the resin. It can improve the dispersibility and adhesion of fillers in resins, enhance process performance, and improve the mechanical, electrical, and weather resistance properties of filled plastics (including rubber).

（3） Used as a thickening agent for sealants, adhesives, and coatings

It can improve their adhesive strength, water resistance, weather resistance and other properties. Silane coupling agents can often solve the problem of some materials being unable to bond for a long time. The principle of silane coupling agent as a viscosity enhancer is that it has two types of functional groups; A functional group can bond with the adhered skeleton material; And another type of functional group can bind with polymer materials or adhesives, forming strong chemical bonds at the bonding interface, greatly improving the bonding strength. There are generally three methods for the application of silane coupling agents: one is as a surface treatment agent for the skeleton material; The second is to add it to the adhesive, and the third is to directly add it to the polymer material. From the perspective of fully utilizing its effectiveness and reducing costs, the first two methods are better.