3-Mercaptopropyltriethoxysilane, identified by CAS Number 14814-09-6, is a highly versatile silane coupling agent crucial across various industrial applications. This organosilane, also known as (3-Mercaptopropyl)triethoxysilane or 3-(Triethoxysilyl)propanethiol, features a unique bifunctional structure, comprising a reactive organic mercapto group and a hydrolyzable inorganic triethoxysilyl group. This dual functionality enables it to effectively bridge organic polymers with inorganic substrates, thereby enhancing material performance significantly.

Typically appearing as a clear to straw-colored liquid, 3-Mercaptopropyltriethoxysilane possesses a distinct, unpleasant sulfide odor. Its key physical and chemical properties include a density of approximately 0.987 g/mL, a boiling point of 210 ℃, and a flash point of 88 ℃. The refractive index is 1.4331. With a purity of 98.0% or greater, it meets stringent industrial requirements. It exhibits slow hydrolysis in water and is sensitive to moisture, necessitating storage in cool, well-ventilated areas, ideally in strictly sealed original containers to maintain its shelf life.

The primary application of 3-Mercaptopropyltriethoxysilane lies in its capacity as a powerful coupling agent. It is extensively utilized to boost the adhesion of sulfur-cured elastomers, such as polysulfide and polyurethane sealants, to a wide array of inorganic fillers including silica, clay, glass, mica, and talc, as well as fiberglass and other hard surfaces. This improved adhesion translates directly into enhanced product durability and structural integrity.

Beyond adhesion promotion, this silane coupling agent is instrumental in elevating the properties of mineral-filled elastomers. Its incorporation leads to substantial improvements in critical mechanical characteristics. Users can observe enhanced modulus, increased tensile and tear strength, reduced heat buildup, superior abrasion resistance, improved resilience, and a lower compression set. Furthermore, it can optimize cure times, contributing to more efficient production processes. Products benefiting from these enhancements include shoe soles, various rubber rollers and wheels, white sidewalls for tires, and critical wire and cable insulation components. In the tire industry, 3-Mercaptopropyltriethoxysilane is particularly valued for its ability to improve low-rolling resistance in silica-reinforced tire tread compounds, contributing to better fuel efficiency and tire longevity.

The application methods for 3-Mercaptopropyltriethoxysilane are flexible; it can be employed as a pretreatment agent for minerals or seamlessly added during the compounding process of materials. Its utility extends to acting as a crosslinker for various organic polymers and as an additive in resin formulations. It also serves as a crucial component in the preparation of finishing agents and shrink-proof agents for textiles and fabrics, offering improved texture and dimensional stability. Moreover, it functions as an effective surface modifier and adhesion promoter for the silylation treatment of metals, providing enhanced resistance to corrosion and oxidation, while improving adhesion with polymeric coatings.

As a leading manufacturer and supplier of specialized silanes, NINGBO INNO PHARMCHEM CO.,LTD. is committed to providing high-quality 3-Mercaptopropyltriethoxysilane. Our product is available in standard 200 kg drums, with custom packaging options available to meet specific customer requirements. For detailed information on price or to purchase this essential chemical, please reach out to our sales team. We ensure consistent quality and reliable supply to support your production needs globally.