Description

Carboxymethyltriethoxysilane is a versatile organosilicon coupling agent featuring both alkoxysilane and carboxylic acid functional groups. This unique bifunctional structure is critical for creating durable chemical bridges between inorganic substrates and organic polymers or coatings. It is essential for manufacturers seeking to enhance adhesion, improve mechanical properties, and impart specific surface functionalities in advanced composite materials. Key industries that rely on this compound include specialty adhesives & sealants, advanced coatings, and high-performance rubber and plastic composites.

Application

• Adhesion Promoter: Used as a key component in primers and coupling agents to dramatically improve the bond strength between glass, metals, or minerals and organic polymers like epoxies, polyurethanes, and acrylics.
• Surface Modification: Imparts hydrophilic or specific functional groups onto silica, glass fiber, and other filler surfaces to enhance compatibility and dispersion within polymer matrices.
• Crosslinking Agent: Serves as a co-monomer or crosslinker in silicone-based sealants, RTV rubbers, and hybrid organic-inorganic coatings to improve tensile strength, elasticity, and chemical resistance.
• Filler Treatment: Essential for pretreating mineral fillers (e.g., calcium carbonate, talc) and reinforcing fibers (e.g., fiberglass) to reduce viscosity, prevent agglomeration, and increase load-bearing capacity in composites.
• Water-based System Modifier: Its carboxylic acid group allows for use in aqueous formulations, acting as a stabilizer and adhesion promoter in water-borne paints, coatings, and adhesives.
• Nanomaterial Synthesis: Employed in the sol-gel process for the surface functionalization of nanoparticles (e.g., silica, titania) to control their assembly and integration into advanced materials.

Basic Information

Product Name	Carboxymethyltriethoxysilane
CAS No.	162781-72-8
Molecular Formula	C8H18O5Si
Molecular Weight	222.31 g/mol
Synonyms	(Carboxymethyl)triethoxysilane; Triethoxy(carboxymethyl)silane; 2-(Triethoxysilyl)acetic acid; Carboxymethyltriethoxysilane; Silane, (carboxymethyl)triethoxy-; Acetic acid, 2-(triethoxysilyl)-; CMES
EINECS	Contact for details

Quality Control

Our Carboxymethyltriethoxysilane is manufactured under strict quality management protocols to ensure batch-to-batch consistency and high purity. Each production lot undergoes comprehensive analytical testing, including Gas Chromatography (GC) for assay and impurity profiling, and titration for functional group analysis. A Certificate of Analysis (COA) detailing all relevant specifications is provided with every shipment. Our quality system is designed to meet the stringent requirements of industrial and R&D applications, ensuring reliable performance in your formulations.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at temperatures between 15°C and 25°C (59°F and 77°F). Due to its hygroscopic and highly volatile nature, the container must be kept tightly sealed when not in use to prevent moisture absorption and evaporation. Keep away from heat, sparks, and open flame.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Density (at 20°C)	~1.05 g/cm³
Refractive Index (n20D)	~1.410
Moisture (Karl Fischer)	≤ 0.5%

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