1. The main function of silane coupling agent in coatings and inks is to improve the adhesion, water resistance, weather resistance, and abrasion resistance of the coating film and the substrate, improve the compatibility/dispersibility of the resin and the extender pigment, and improve the cross-linking component system of the matrix resin, and increases the surface hardness of the coating film.

2. In metal surface treatment, silane coupling agent can partially replace electrophoretic paint or electroplating, form a temporary protective layer on the metal surface, and improve the adhesion between the substrate and the next coating.