Description

Triethoxy-[3-(3-Triethoxysilylpropylsulfanyl)Propyl]Silane is a bifunctional organosilane coupling agent featuring both alkoxysilane and thiol (mercapto) functional groups. This unique molecular structure enables it to act as a powerful adhesion promoter and surface modifier, creating durable bonds between inorganic substrates and organic polymers. It is essential for formulators and manufacturers in the rubber, coatings, and composite industries seeking to enhance material performance, durability, and interfacial strength. The compound's dual functionality allows for versatile crosslinking and improved dispersion of fillers.

Application

• Rubber Compounding: As a coupling agent for silica-filled tires and industrial rubber goods, improving abrasion resistance, reducing rolling resistance, and enhancing mechanical properties.
• Adhesives and Sealants: To improve adhesion to glass, metals, and mineral surfaces, especially in demanding environments.
• Coatings and Inks: As an additive to enhance scratch resistance, corrosion protection, and adhesion of paints and printing inks to various substrates.
• Fiberglass and Composite Materials: As a sizing or finishing agent for glass fibers to improve the interfacial bond with polymer matrices like epoxy or polyester.
• Filler Treatment: For surface modification of minerals (e.g., silica, clay) and pigments to improve their compatibility and dispersion in polymer systems.
• Crosslinking Agent: In silicone formulations and other polymer systems where the thiol group can participate in addition-cure or radical reactions.

Basic Information

Product Name	Triethoxy-[3-(3-Triethoxysilylpropylsulfanyl)Propyl]Silane
CAS No.	60764-86-5
Molecular Formula	C18H42O6S2Si2
Molecular Weight	466.8 g/mol
Synonyms	Bis(triethoxysilylpropyl) tetrasulfide (analogous common name); 3,3'-Thiobis(propyltriethoxysilane); 3,3'-Thiodipropyltriethoxysilane; 3-(3-(Triethoxysilyl)propylthio)propyltriethoxysilane; Thiodipropylbis(triethoxysilane); Silane coupling agent Si-75 (common trade designation); Mercaptosilane; Sulfur-bridged silane coupling agent
EINECS	Contact for details

Quality Control

Our production of Triethoxy-[3-(3-Triethoxysilylpropylsulfanyl)Propyl]Silane adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance reliability. Each lot is analyzed against comprehensive specifications using advanced techniques like Gas Chromatography (GC) and Infrared Spectroscopy (IR). A Certificate of Analysis (COA) detailing purity, identity, and key physical properties is provided with every shipment to support your quality assurance and regulatory needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C/59-77°F). Due to its hygroscopic (moisture-sensitive) nature, containers must be kept tightly sealed after opening to prevent hydrolysis and maintain product integrity. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 95.0%
Refractive Index (n20D)	1.440 - 1.450
Density (20°C)	1.00 - 1.05 g/cm³
Moisture (Karl Fischer)	≤ 0.5%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.