Silane coupling agents are a class of organosilicon compounds containing two different chemical groups in the molecule, and the classical products can be represented by the general formula YSiX3. Wherein Y is a non-hydrolyzable group and X is a hydrolyzable group. Due to this special structure, the silane coupling agent acts at the interface of inorganic materials (such as glass, metal or minerals) and organic materials (such as organic polymers, coatings or adhesives), and the bonding or coupling is quite different. material. It enhances the affinity between organic and inorganic compounds and enhances the physical and chemical properties of composites such as strength, toughness, electrical properties, water resistance and corrosion resistance.

When glass fibers or mineral reinforced organic polymers are used, the interface or interfacial phase between the polymer and the inorganic material involves a complex interplay between many physical and chemical factors. These factors are related to adhesion, physical strength, coefficient of expansion, concentration gradient, and product performance retention. An important destructive force affecting adhesion is the migration of moisture to an inorganically enhanced hydrophilic surface. The water erodes the interface and destroys the bond.
"Real" coupling agents can form water-resistant bonds at the interface between inorganic and organic materials. The silane coupling agent has unique chemical and physical properties that not only enhance the bonding strength, but, more importantly, prevent the bond disintegration at the interface during aging and use of the composite. The coupling agent imparts a stable bond between two distinct, difficult to bond surfaces.
In composites, the choice of a suitable silane can increase the flexural strength of the composite by more than 40%. The silane coupling agent also enhances the bond strength between the coating and the adhesive while enhancing resistance to humidity and other vicious environmental conditions.
Other advantages that silane coupling agents offer include:
1, better wet inorganic materials
2, with lower viscosity when compounding
3. Smoother composite surface
4. Reduce the inhibitory effect of inorganic materials on thermosetting composite catalysts
5. Clearer and transparent reinforced plastic

Coatings using silane coupling agents have the following advantages:
1, corrosion resistance
2, improve adhesion
3. Improve rheology
4, improve the dispersion of dyes and fillers
5, anti-UV
6, waterproof and chemical resistant
Synthetic elastomeric and resinous coatings often encounter sticking problems on hydrophilic silicate and metallic surfaces, especially in high moisture, water or salt, the coating's protection depends on the substrate surface. The adhesion promoter is achieved, whether it is used as a coating additive or a primer, the silane coupling agent can improve the performance of the coating.