3-Isocyanatopropyltriethoxysilane

3-Isocyanatopropyltriethoxysilane (CAS 24801-88-5), also known as ICPTES, is a bifunctional silane coupling agent combining an isocyanate group with an alkoxysilane anchor.

Where is 3-Isocyanatopropyltriethoxysilane used?

• Adhesives, sealants and structural bonding: improves adhesion to glass and metal where moisture resistance matters
• Coatings: crosslinks polyurethane systems onto treated surfaces, improving durability and intercoat adhesion on automotive and industrial parts
• Filled polymer compounds: surface modifier for silica and glass fiber, improving stress transfer in reinforced plastics
• Electronics encapsulants and underfill resins: enhances interfacial adhesion under thermal cycling, preventing delamination
• It bonds organic polymer matrices to inorganic substrates by reacting at both interfaces simultaneously.

Good to know: Moisture-sensitive handling requirements influence packaging specifications; nitrogen-blanketed containers are standard for bulk shipments. Proper storage is essential to maintain the stability and reactivity of the isocyanate functional group.

Commercial specifications

• Purity typically 95% or higher
• Packaging from small laboratory quantities up to bulk drums and IBC containers