n-(2-Aminoethyl)-3-aminopropyltriethoxysilane

N-(2-Aminoethyl)-3-aminopropyltriethoxysilane (CAS 5089-72-5, EC 225-806-1) is a diamine-functional alkoxysilane supplied under the trade designation GF 90. It carries no assigned E-code. The molecule combines an ethoxy-silane anchor with a diamine chain, giving it dual reactivity toward both inorganic surfaces and organic polymer matrices.

In glass-fibre-reinforced plastics, GF 90 bonds the silica surface to epoxy or polyurethane resins by forming covalent siloxane linkages at the substrate and reacting through its amine groups with the polymer network. In electronics encapsulants and rubber compounding, it functions as a cross-linking agent and adhesion promoter, improving interfacial strength and moisture resistance at the filler-matrix boundary.

GF 90 is supplied as a technical-grade liquid and is registered under REACH. Standard packaging follows European bulk chemical conventions; drum and IBC formats are available on request. Buyers should confirm current SDS documentation and lot-specific purity certificates prior to formulation use.