Methyltriethoxysilane (MTES) is a widely used organosilane raw material in the fields of silicone materials, functional coatings, and inorganic material modification. It has the CAS number 2031-67-6, the molecular formula CH₃Si(OC₂H₅)₃, and a molecular weight of approximately 178.30–178.5.

A key characteristic of methyltriethoxysilane is that its molecule contains both an organic methyl group and three hydrolyzable ethoxy groups. The ethoxy groups can undergo hydrolysis in the presence of moisture and appropriate catalysts, followed by condensation reactions with other silanes or silanols; consequently, MTES serves as a vital co-precursor in sol-gel systems and is used to produce cross-linked silicone materials.

In the realm of silicone resins, methyltriethoxysilane participates in the formation of the resin structure. By controlling formulation ratios, catalytic conditions, and the hydrolysis-condensation process, one can tune the final material's cross-linked structure, hardness, water resistance, and surface properties. Product literature lists MTES as a raw material for silicone polymers, silicone resins, coatings, and sealant systems, where it functions as a cross-linking agent or adhesion promoter.

In sol-gel technology, MTES is frequently used in conjunction with tetraethoxysilane (TEOS). Research indicates that the hydrolysis and condensation of MTES and TEOS yield organic-inorganic hybrid silicon materials; adjusting the MTES ratio allows for the modification of properties such as porosity, shrinkage, cracking tendency, and surface wettability.

Therefore, if you are seeking methyltriethoxysilane for silicone resin synthesis, sol-gel systems, organic-inorganic hybrid materials, or functional coatings, IOTA 150 is an excellent choice of MTES raw material.


IOTA 150 Methyltriethoxysilane: CAS 2031-67-6; appears as a colorless, transparent liquid with a purity of ≥99%; suitable for applications including silicone resins, sol-gel materials, and inorganic material modification.