(3-Aminopropyl)methyldiethoxysilane

(3-Aminopropyl)methyldiethoxysilane (CAS 3179-76-8) is an aminofunctional alkoxysilane commercially available under trade names including Dynasylan 1505, Dynasylan 1506, and KBE 902. It carries no assigned E-code. The molecule combines a reactive amine group with hydrolysable ethoxy groups on a silicon centre.

In polymer and composite manufacturing, it functions as an adhesion promoter by forming covalent bonds between inorganic substrates and organic resin matrices after hydrolysis and condensation. In epoxy and polyurethane systems it acts as a crosslinker, with the primary amine reacting directly with epoxide or isocyanate groups to build network density and improve mechanical performance.

The material is supplied as a neat liquid and falls under REACH registration requirements for EU import and use. Buyers should request a current Safety Data Sheet and confirm supplier REACH compliance documentation. Standard packaging formats include drums and IBC containers, with smaller laboratory quantities available on request.