Three major applications of organosilicon silane coupling agents

The application of silane coupling agents can be roughly summarized into three aspects:

1. Used for surface treatment of glass fibers, it can improve the bonding performance between glass fibers and resins, 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.