In January 2026, professional content in the coating industry showed that silane coupling agents, as key additives, are solving common problems such as coating peeling, chipping, and poor corrosion resistance. Known as the "molecular bridge" between the two, they feature the ability to "bind organic coating resins on one end and inorganic substrates on the other". Their core structure is "organic tail – silicon – alkoxy group", and their operation requires three steps: hydrolysis, association, and bonding. First, they hydrolyze into silanol, then condense and adsorb on the substrate surface, and finally form chemical bonds with the substrate and resin. Selection must follow the principle of "matching functional groups + system compatibility + process adaptation". For example, epoxy-based silanes are suitable for epoxy systems, and amino-based silanes for multiple resin types. In scenarios like industrial anti-corrosion, floor coatings, and water-based paints, adding 0.3%-2% silane coupling agents can significantly improve coating adhesion and weather resistance. With small dosage and controllable cost, they become key to optimizing coating formulations.

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