Enhance the adhesion between filler and polymer substrate
Reduce the viscosity of uncured adhesives and sealants
Cross-linking of bonding parts
Extend bond life
As adhesion promoter, silanes can be applied to most resin systems. With their presence, excellent bonding can be formed on metals, glass and other surfaces, improving the bonding ability of adhesives and sealants on different surfaces. These silanes are the most commonly used coupling agents for the condensation silicone sealants and adhesives.
Silane coupling agent can not only improve the adhesive strength, but also improve some properties of adhesives and sealants, such as water resistance, thermal stability, chemical resistance, shear strength, ultraviolet radiation resistance, durability and hygrothermal aging resistance.For example, although polyurethane has high adhesion to many materials, its durability is not ideal. After adding silane coupling agent, its durability can be significantly improved. Silane coupling agent can even be directly used as adhesive for bonding metal with silicone rubber, fluororubber, nitrile rubber, etc.
Use proper silanes to treat the filler in advance, silanes can react with the polar groups on the surface of the fillers, which not only greatly improves the compatibility and dispersion of the filler to the adhesive matrix resin, but also significantly reduces the viscosity of the system, thus increasing the amount of filler and reduce the cost.