Improved Adhesive Bond Permanence with Reactive Organosilane Coupling Agents.

摘要

Five reactive organosilane coupling agents, (Dow Corning Z6020, Z6032, Z6040, Z6062 and Union Carbide Corp. A-1100) were evaluated as adhesion promoters to improve the adhesive bond strength of 2024T3, 6061T4 aluminum alloys and 302 stainless steel and to protect the bonds against the deleterious effects of water. The organosilane coupling agents, mercaptopropyltrimethoxysilane (D.C.Z6062), and glycidoxypropyltrimethoxysilane (D.C.Z6040) generally showed better bond strength intially and after adverse exposure than the control samples when bonded with room temperature-curing epoxy resin. The glycidoxypropyltrimethoxysilane (Z6040) showed bettter initial bond strength than the control samples and good retention of bond integrity after adverse exposure when used with aluminum alloys and an intermediate cure temperature (121 C (250 F)) epoxy adhesive. The remaining organosilanes did not show appreciable improvement over the control samples. (Author)