(3-amino-propyl) triethoxysilane (APTES) is an amino silane commonly used in the silanization process, which functionalizes the surface with alkoxysilane molecules.

Appearance and properties: colorless liquid

Density: 0.946 g/mL at 25 °C(lit.)

Boiling point: 217 °C(lit.)

Melting point: -70 °C

Flash point: 205 °F

Refractive index: n20/D 1.422

Water solubility: REACTS

Stability: Stable. Incompatible with acids, strong oxidizing agents. May decompose on exposure to moisture.

Storage: Store at RT.

Used as glass fiber treatment agent and dental binder, silane coupling agent, used in mineral filled phenolic, polyester, epoxy, PBT, polyamide, carbonate and other thermoplastic and thermosetting resins, can greatly improve and enhance the dry and wet state bending strength, compressive strength, shear strength and other physical and mechanical properties and wet electrical properties of plastics. The wettability and dispersibility of the filler in the polymer are improved. It is an excellent bonding accelerator for polyurethane, epoxy, nitrile, phenolic adhesives and sealing materials, which can improve the dispersion of pigments and increase the adhesion to glass, aluminum, iron metals, and also suitable for polyurethane, epoxy and acrylic latex coatings. In the casting of resin sand, it can enhance the adhesion of resin silica sand, improve the strength and moisture resistance of molding sand. In the production of glass fiber cotton and mineral wool, it can be added to phenolic resin binder to improve moisture resistance and compressive resilience. In the manufacture of grinding wheel, it is helpful to improve the adhesion and water resistance of the phenolic resin adhesive of wear-resistant self-hardening sand.