Triethoxypropylsilane
Triethoxypropylsilane (CAS: 2550-02-9), also known as n-propyltriethoxysilane, is an organosilane coupling agent combining three hydrolyzable ethoxy groups with a hydrophobic n-propyl chain. Upon exposure to moisture, the ethoxy groups hydrolyze to silanols that bond covalently to silica, glass, metals, and mineral surfaces, while the short alkyl chain modifies surface energy and compatibility with organic matrices. This clear liquid is used to hydrophobize fillers and pigments in rubber and plastic compounding, improving dispersion and reducing moisture absorption. In construction, it serves as a penetrating water repellent for concrete and masonry, and as a primer enhancing adhesion between sealants and mineral substrates. It also functions as a chain modifier in silicone resin synthesis, contributing controlled organic character. With its balance of reactivity and hydrophobic performance, propyltriethoxysilane is a versatile agent for surface treatment and composite formulation.
– Surface Hydrophobization: Applied to concrete, stone, and brick as a durable penetrating water repellent that protects against moisture damage.
– Filler Treatment: Used to modify silica and mineral fillers, enhancing hydrophobicity and dispersion in rubber, sealant, and plastic compounds.
– Adhesion Promotion: Serves as a primer improving bonding between silicone sealants, adhesives, and mineral or glass substrates.
– Silicone Resin Modification: Incorporated into resin synthesis to introduce propyl functionality, tuning flexibility and surface properties.
Product Name: Triethoxypropylsilane
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