Description

11-(Trimethylsiloxy)Undecyltriethoxysilane is a specialized organofunctional silane coupling agent featuring a long alkyl chain terminated with a triethoxysilyl group and a trimethylsiloxy-protected hydroxyl. This compound is engineered to create durable covalent bonds between inorganic substrates and organic polymers, significantly enhancing composite material performance. It is essential for formulators and manufacturers in the coatings, adhesives, and advanced materials sectors seeking to improve adhesion, dispersion, and moisture resistance in their products.

Application

• Surface Modification Agent: Primarily used to functionalize the surface of inorganic fillers (e.g., silica, glass, metals) to improve compatibility and bonding with organic polymer matrices in composites.
• Adhesion Promoter: Enhances the adhesion of coatings, sealants, and adhesives to difficult-to-bond substrates like glass, metals, and minerals.
• Hydrophobic Coating Precursor: Serves as a key intermediate in formulating water-repellent and anti-corrosion coatings for construction, automotive, and textile applications.
• Reinforced Plastics and Elastomers: Improves the mechanical properties, such as tensile strength and tear resistance, in silicone rubber, polyurethane, and epoxy composites by promoting better filler-matrix interaction.
• Crosslinking Agent: Used in silicone-based systems to introduce crosslinks, enhancing thermal stability and chemical resistance.
• Fiber Treatment: Applied to glass or mineral fibers to improve their interfacial adhesion with plastic resins in fiber-reinforced plastics (FRP).

Basic Information

Product Name	11-(Trimethylsiloxy)Undecyltriethoxysilane
CAS No.	75389-03-6
Molecular Formula	C₂₀H₄₆O₄Si₂
Molecular Weight	406.76 g/mol
Synonyms	Undecyltriethoxysilane, 11-(trimethylsiloxy)-; 11-(Trimethylsilyloxy)undecyltriethoxysilane; Triethoxy[11-(trimethylsiloxy)undecyl]silane; γ-(Trimethylsiloxy)propyltriethoxysilane homologue; Silane coupling agent Z-6111 (trade name equivalent); 11-(Trimethylsiloxy)-1-undecyltriethoxysilane; (Triethoxysilyl)undecyl trimethylsilyl ether
EINECS	Contact for details

Quality Control

Our production of 11-(Trimethylsiloxy)Undecyltriethoxysilane adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including GC, NMR, and FTIR, to ensure identity, purity, and consistency meet precise specifications. We provide full traceability and a Certificate of Analysis (COA) with each shipment, confirming compliance with agreed parameters. Our quality system is designed to support customer requirements in ISO-certified manufacturing environments.

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, the container must be kept tightly sealed under a dry inert atmosphere (e.g., nitrogen) after opening to prevent hydrolysis and maintain product integrity. Keep away from strong acids, bases, and oxidizing agents.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 95.0%
Refractive Index (n20/D)	1.425 - 1.435
Density (g/mL, 25°C)	0.90 - 0.95

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