Used as a coupling agent in composite materials to improve adhesion between organic polymers and inorganic surfaces, especially in coatings, sealants, and adhesives. Enhances durability and moisture resistance in glass fiber-reinforced plastics and mineral-filled composites. Commonly applied in automotive, construction, and electronics industries where strong interfacial bonding is critical. Also utilized in surface modification of silica and metal oxides to introduce reactive nitrile groups for further chemical functionalization.