In the field of thermosetting composite materials, especially in glass fiber reinforced materials and filled epoxy and polyurethane resins, 3-(2,3-epoxypropoxy)propyltrimethoxysilane plays a bridging role. Through its epoxy functional group and resin cross-linking, its hydrolyzed silane group can be firmly adsorbed on inorganic surfaces such as glass fiber and silica, thereby enhancing the interfacial bonding strength.

During the hot pressing curing process, the primer treatment containing this silane can significantly improve the interfacial compatibility between the fiber and the resin, making the overall physical properties of the product better and the peeling strength higher. For systems with a high ratio of high-strength fillers (such as talcum powder, wollastonite, and quartz powder), this coupling agent can effectively reduce interface defects and enhance product consistency.

Today, it is widely used in automotive composite materials, wind turbine blades, building structural components and other fields, and has become a reliable choice for industry designers in pursuit of light weight and high strength.