Description

(Mercaptomethyl)Triethoxysilane is a bifunctional organosilicon compound featuring both a hydrolyzable ethoxysilyl group and a reactive mercaptomethyl group. This unique structure makes it an exceptionally effective coupling agent and surface modifier, bridging the interface between inorganic materials and organic polymers. It is essential for manufacturers in the rubber, adhesive, sealant, and composite industries seeking to enhance material properties such as adhesion, dispersion, and mechanical strength. The compound is supplied under strict quality control to ensure batch-to-batch consistency for demanding industrial applications.

Application

• Rubber Reinforcement: Acts as a key silane coupling agent in silica-filled rubber compounds (e.g., green tires) to improve filler dispersion, reduce rolling resistance, and enhance abrasion resistance.
• Adhesive & Sealant Formulation: Used as an adhesion promoter in polysulfide and polyurethane sealants and adhesives, significantly improving bond strength to glass, metals, and mineral surfaces.
• Fiberglass & Mineral Treatment: Applied as a sizing or finishing agent for glass fibers and mineral fillers to improve their compatibility and interfacial adhesion with polymer matrices in composites.
• Surface Modification: Modifies the surface of pigments, nanoparticles, and inorganic substrates to improve their hydrophobicity, dispersion stability, and integration into organic systems.
• Crosslinking Agent: Serves as a co-monomer or crosslinker in the synthesis of specialty polymers and silicone hybrids, contributing to network formation and property enhancement.
• Primer & Coating Additive: Incorporated into primers and coating formulations to boost corrosion resistance and adhesion on metallic substrates.

Basic Information

Product Name	(Mercaptomethyl)Triethoxysilane
CAS No.	60764-83-2
Molecular Formula	C7H18O3SSi
Molecular Weight	210.37 g/mol
Synonyms	3-Mercaptopropyltriethoxysilane (common misnomer, related compound); Mercaptomethyltriethoxysilane; Triethoxy(mercaptomethyl)silane; (Mercaptomethyl)triethoxysilane; Silane, triethoxy(mercaptomethyl)-; SH-Triethoxysilane derivative; Adhesion promoter 60764-83-2; Silane coupling agent with thiol group
EINECS	262-425-1

Quality Control

Our (Mercaptomethyl)Triethoxysilane is manufactured and tested under a stringent quality management system. Each batch is analyzed to ensure it meets precise specifications for purity, identity, and performance. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical properties is provided with every shipment. We are committed to supplying material that meets the consistent quality requirements of the rubber, adhesive, and composite industries.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive) and easily oxidized; it is recommended to store under an inert atmosphere (e.g., nitrogen) after opening to maintain purity and prevent degradation. Keep away from strong oxidizing agents and bases.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Refractive Index (n20/D)	1.430 - 1.440
Density (20°C)	0.98 - 1.02 g/mL
Water Content (KF)	≤ 0.5%

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