Description

Methoxytriethyleneoxyundecyltrimethoxysilane is a specialized organosilane coupling agent featuring a unique hybrid structure with a long polyether chain. This molecular architecture is critical for creating stable, durable bonds between inorganic substrates and organic polymer matrices. It is essential for formulators and manufacturers in the coatings, adhesives, and composites industries seeking to enhance material compatibility, improve adhesion, and modify surface properties.

Application

• As a surface modifier and coupling agent in glass fiber-reinforced plastics and mineral-filled composites to improve mechanical strength and moisture resistance.
• As a primer or additive in coatings and inks to promote adhesion to difficult substrates like metals, glass, and treated plastics.
• For the hydrophilic modification of silica and other fillers to improve their dispersion and compatibility in polar polymer systems such as polyurethanes and epoxies.
• In the formulation of sealants and adhesives to enhance bonding performance and environmental durability.
• As a chemical anchor or grafting agent in the surface functionalization of nanoparticles for advanced material applications.
• Potential use in personal care and textile treatments as a conditioning agent or softener due to its polyether chain.

Basic Information

Product Name	Methoxytriethyleneoxyundecyltrimethoxysilane
CAS No.	1858242-37-1
Molecular Formula	C20H44O7Si
Molecular Weight	424.65 g/mol
Synonyms	11-(2-(2-(2-Methoxyethoxy)ethoxy)ethoxy)undecyltrimethoxysilane; Undecyltrimethoxysilane, triethylene glycol monomethyl ether derivative; Silane, trimethoxy[11-[2-[2-(2-methoxyethoxy)ethoxy]ethoxy]undecyl]-; Triethylene glycol monomethyl ether undecyltrimethoxysilane; PEG-3 methyl ether undecyltrimethoxysilane; (3,6,9-Trioxahenicosyl)trimethoxysilane
EINECS	Contact for details

Quality Control

Our Methoxytriethyleneoxyundecyltrimethoxysilane is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing, including assay by GC or HPLC and identity confirmation by FT-IR and NMR, to ensure high purity and consistent performance. Certificates of Analysis (COA) detailing all relevant specifications are available upon request to support your quality assurance protocols.

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). Due to its hygroscopic (moisture-sensitive) nature, containers must be kept tightly sealed after opening to prevent degradation by atmospheric moisture.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC/HPLC)	≥ 95.0%
Refractive Index (n20D)	1.440 - 1.450
Density (g/mL, 20°C)	0.98 - 1.02
Water Content (KF)	≤ 0.5%

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