Ureidopropyltriethoxysilane

Ureidopropyltriethoxysilane (CAS 23779-32-0), also known commercially as 3-Ureidopropyltriethoxysilane, is an organosilane coupling agent that bridges inorganic substrates and organic polymer matrices.

Where is Ureidopropyltriethoxysilane used?

• Glass fiber-reinforced composites and filled plastics: bonds mineral fillers
• Polyamide, epoxy and polyurethane matrices: improves mechanical retention under humid conditions
• Adhesives and sealants: primer or additive for substrate adhesion
• Electronics encapsulants and underfill resins: promotes interfacial adhesion between inorganic substrates and polar thermoset systems
• Automotive coatings and structural bonding: improves wet adhesion on treated metal and composite surfaces
• It improves adhesion at interfaces where standard silanes underperform, particularly with polar resins and moisture-exposed systems.

Good to know: Effective on glass, metal and concrete surfaces where long-term durability is required. Handle according to standard chemical safety and storage protocols.

Commercial specifications

• Purity typically 95% or higher
• Packaging from small drums to bulk quantities