Perfluoropolyether Silane with UV Absorbing Groups

The invention combines fluorine-containing silane compound with UV-absorbing groups (such as benzotriazole, benzophenone, triazine, or salicylate groups) to create a composite surface treatment agent. This composite structure allows the material to simultaneously provide water-repellency from the fluorine-containing component and ultraviolet resistance from the UV-absorbing groups, resolving the contradiction between hydrophobicity and light stability.

The surface treatment agent is designed to perform multiple functions simultaneously: the fluorine-containing silane portion provides water-repellency and oil-repellency, while the incorporated UV-absorbing groups provide ultraviolet resistance and light stability. This multi-functional design eliminates the need for separate treatments and achieves both properties in a single coating layer.

By creating a composite surface treatment agent that integrates fluorine-containing silane with UV-absorbing chromophores, the invention achieves long-term durability against ultraviolet exposure. The UV-absorbing groups act as molecular sunscreens, absorbing harmful UV radiation before it can degrade the fluorine-containing layer, thereby extending the service life of the water-repellent coating.

The UV-absorbing groups are incorporated into the surface treatment agent structure in advance, providing preemptive protection against ultraviolet damage. These groups absorb UV energy before it can reach and degrade the fluorine-containing silane network, cushioning the main functional layer against environmental degradation and maintaining durability over time.