(1) For the surface treatment of glass fiber, it can improve the bonding properties of glass fiber and resin, and greatly improve the strength, electrical, water resistance, weather resistance and other properties of glass fiber reinforced composite materials. The improvement of the mechanical properties of composite materials is also very effective. At present, the use of silane coupling agent in glass fiber has been quite common, and the silane coupling agent used in this aspect accounts for about 50% of its total consumption, among which the most used varieties are vinyl silane, amino silane, Methacryloxysilane, 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 dispersion and adhesion of fillers in resins, improve process performance and improve the mechanical, electrical and weather resistance properties of filled plastics (including rubber).

(3) Silane coupling agent is used as a tackifier for sealants, adhesives and coatings, which can improve their bonding strength, water resistance, weather resistance and other properties. Silane coupling agents can often solve the problem that some materials cannot be bonded for a long time. The principle of silane coupling agent as a tackifier is that it has two groups; one group can be combined with the skeleton material to be bonded; and the other group can be combined with polymer materials or adhesives, thereby forming a strong chemical bond at the bonding interface, which greatly improves the bonding strength.

There are generally three methods for the application of silane coupling agent: 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 giving full play to its effectiveness and reducing costs, the first two methods are better.