3-Ureidopropyltriethoxysilane

3-Ureidopropyltriethoxysilane (CAS 23779-32-0) is an organosilane coupling agent supplied as a clear liquid, also known under trade designations Y 5650, A 1160, and AY 43-031. It carries no assigned E-code. Its molecular formula is C10H24N2O4Si, and it is classified under HS code 2931.90.9010.

In glass-fibre-reinforced composites, the ureido group bonds to polar polymer matrices such as nylons and epoxies while the ethoxy groups hydrolyse and condense onto inorganic surfaces, creating a covalent bridge that improves interlaminar shear strength. In adhesive and sealant formulations it promotes adhesion to glass and metal substrates by forming a durable siloxane network at the interface during cure.

This material is supplied in standard industrial grades compliant with REACH registration requirements. Typical packaging includes drums and intermediate bulk containers. Buyers should confirm current SDS documentation and lot-specific purity certificates with the supplier prior to procurement.