3-Ureidopropyltrimethoxysilane

3-Ureidopropyltrimethoxysilane (CAS 23843-64-3), also known commercially as Ureidopropyltrimethoxysilane, is an organosilane coupling agent that bridges inorganic substrates and organic polymer matrices. It improves adhesion at mineral or glass interfaces by forming covalent bonds on both sides of the interface, reducing delamination and improving composite durability across various industrial applications.

In glass fiber-reinforced composites and filled polymer systems, it improves fiber-to-matrix adhesion, directly affecting mechanical performance and moisture resistance of the finished part for long-term use. Adhesive and sealant formulators use it as a primer or additive to improve bonding to glass, concrete, and metal substrates, particularly in construction and automotive assembly projects.

In coatings for electronics, it promotes adhesion of encapsulants and conformal coatings to circuit board substrates where long-term humidity resistance is critical for maintaining device integrity. It also functions as a crosslinker in moisture-cure systems, contributing to network formation in silane-modified polymer sealants used in high-performance industrial and commercial sealing applications.

3-Ureidopropyltrimethoxysilane is supplied as a liquid, typically at high purity grades suitable for industrial compounding and specialty formulation where consistent chemical performance is required. Technical grade is the standard offering across most suppliers, with high-purity grades available for electronics and precision adhesive applications. Packaging ranges from small drums to IBC quantities.