Description

Triethoxysilylethyl Terminated Polydimethylsiloxanes is a specialized organosilicon compound, a reactive silicone fluid featuring terminal triethoxysilyl groups. This unique structure provides excellent adhesion to inorganic substrates and crosslinking capability, making it a crucial component for enhancing material performance. It is primarily used by formulators and manufacturers in the coatings, adhesives, sealants, and elastomers (CASE) industries, as well as in advanced composites and surface modification applications.

Application

• Adhesion Promoter & Coupling Agent: Enhances the bond between organic polymers (e.g., silicones, epoxies) and inorganic surfaces like glass, metals, and minerals.
• Crosslinker for Silicone Polymers: Serves as a reactive endblocker or crosslinking agent in moisture-curable silicone sealants, RTV (Room Temperature Vulcanizing) rubbers, and coatings.
• Surface Modification & Primers: Used to treat fillers (e.g., silica) and surfaces to improve dispersion in polymer matrices and increase hydrophobicity or chemical resistance.
• Hybrid Material Synthesis: A key precursor for creating inorganic-organic hybrid materials (ORMOSILs) with tailored mechanical and optical properties.
• Waterproofing & Protective Coatings: Formulated into coatings for construction, automotive, and textile applications to provide durable, water-repellent finishes.
• Fiber Optic & Electronic Encapsulants: Used in potting and encapsulation compounds where stable adhesion and environmental protection are critical.

Basic Information

Product Name	Triethoxysilylethyl Terminated Polydimethylsiloxanes
CAS No.	195158-81-7
Molecular Formula	CnH2n+6O3Si2 (n varies with chain length)
Molecular Weight	Varies by chain length (Contact for details)
Synonyms	Polydimethylsiloxane, triethoxysilylethyl terminated; α,ω-Bis(triethoxysilylethyl) polydimethylsiloxane; Triethoxysilylethyl PDMS; Bis(triethoxysilylethyl) polydimethylsiloxane; Silicone fluid, triethoxysilylethyl terminated; Reactive silicone oil with triethoxysilyl end groups; Ethyltriethoxysilane-terminated PDMS; CAS 195158-81-7
EINECS	Contact for details

Quality Control

Our Triethoxysilylethyl Terminated Polydimethylsiloxanes are manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure consistent performance, including verification of viscosity, silicon content, ethoxy group content, and purity. A comprehensive Certificate of Analysis (COA) documenting these specifications is provided with every shipment to guarantee compliance with your formulation requirements.

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). This product is hygroscopic (moisture-sensitive). Containers must be kept tightly sealed under a dry atmosphere (e.g., nitrogen) to prevent moisture absorption and premature hydrolysis or polymerization.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Viscosity (25°C)	Specified grade dependent (cSt)
Specific Gravity (25°C)	0.95 - 1.05
Refractive Index (n20D)	1.400 - 1.420
Ethoxy Content	As per grade (by Titration)
Purity (GC)	> 95% (Grade dependent)
Water Content (KF)	< 0.1%

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