CAS · 24801-88-5
Product Overview
3-Isocyanatopropyltriethoxysilane is a high-purity adhesives-sealants supplied for industrial and specialty chemical applications. Contact our team for specifications, packaging options and lead times.
Product Specifications
| Appearance | Colorless transparent liquid |
|---|---|
| Assay (GC) | 98% min |
| Specific gravity | 0.95–1.05 |
| Refractive index | 1.4140–1.4240 |
| Chromaticity | 30 |
| NCO (T) | 16.32% min |
Applications
3-Isocyanatopropyltriethoxysilane is a silane coupling agent that serves as a versatile interface modifier between organic polymers and inorganic materials. It is widely used in surface treatment of glass, metals, ceramics, and mineral fillers to enhance adhesion in coatings, adhesives, and sealants. The triethoxysilane group undergoes hydrolysis and condensation to bond with inorganic substrates, while the isocyanate group reacts readily with nucleophiles such as amines, alcohols, and hydroxyl-containing polymers. This dual reactivity makes it valuable in modifying polyurethane, epoxy, and acrylic systems, improving durability, water resistance, and mechanical performance. It is also employed in the synthesis of functionalized siloxanes and hybrid organic–inorganic materials for advanced coatings, electronics, and composite applications.
Benefits
The main benefits of 3-isocyanatopropyltriethoxysilane lie in its ability to form strong covalent bonds at interfaces, improving adhesion and compatibility between dissimilar materials. This results in enhanced mechanical strength, longer service life, and greater resistance to environmental stress, moisture, and chemical attack in composite systems. Its isocyanate group enables versatile functionalization, allowing customization for different polymer matrices, while the silane moiety ensures stable anchoring to inorganic surfaces. Its use often leads to reduced delamination, better dispersion of fillers, and improved processing efficiency. This combination of performance and adaptability makes it an essential material for high-performance adhesives, protective coatings, and structural composites.
Conclusion
3-Isocyanatopropyltriethoxysilane (CAS 24801-88-5) is a multifunctional silane coupling agent that plays a critical role in bridging organic and inorganic phases in advanced materials. Its dual reactive groups provide strong bonding, chemical versatility, and improved durability in adhesives, coatings, and composite systems. With its proven effectiveness in enhancing performance and reliability, it continues to be widely applied in industries requiring robust and long-lasting material interfaces.
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