Description

1,1,3,3-Tetramethyl-1-[2'-(Trimethoxysilyl)Ethyl]-Disiloxane is a specialized organosilicon compound, specifically a silane-modified disiloxane, that serves as a high-performance coupling agent and crosslinker. Its unique hybrid structure, featuring both siloxane and alkoxysilane functionalities, provides exceptional reactivity and compatibility with a wide range of inorganic and organic matrices. This chemical is essential for formulators and manufacturers in the advanced materials sector seeking to enhance adhesion, durability, and surface properties. It is particularly valued for its ability to modify interfaces in demanding composite and coating systems.

Application

• Silicone Resin & Rubber Modification: Acts as a crosslinking agent and property modifier to improve thermal stability, mechanical strength, and adhesion of silicone-based elastomers and resins.
• Adhesion Promoter for Coatings: Used in primers and coating formulations to dramatically improve the adhesion of paints, inks, and adhesives to difficult substrates like metals, glass, and plastics.
• Filler Treatment in Composites: Essential for surface treating silica, glass fibers, and other mineral fillers to enhance dispersion within polymer matrices (e.g., epoxy, polyurethane) and improve composite mechanical properties.
• Waterproofing & Sealants: A key ingredient in high-performance sealants, caulks, and waterproofing materials, where it contributes to excellent weather resistance and long-term elasticity.
• Fiber Sizing: Applied as a sizing agent on glass or carbon fibers to protect filaments and improve the fiber-matrix interfacial bond in reinforced plastics.
• Stone & Masonry Protection: Formulated into consolidants and water repellents for historic preservation and modern construction to protect porous mineral surfaces.

Basic Information

Product Name	1,1,3,3-Tetramethyl-1-[2'-(Trimethoxysilyl)Ethyl]-Disiloxane
CAS No.	137407-65-9
Molecular Formula	C9H26O4Si3
Molecular Weight	282.55 g/mol
Synonyms	(3-(1,1,3,3-Tetramethyldisiloxanyl)propyl)trimethoxysilane; 1,1,3,3-Tetramethyl-1-(3-(trimethoxysilyl)propyl)disiloxane; 3-(1,1,3,3-Tetramethyldisiloxan-1-yl)propyltrimethoxysilane; Disiloxane, 1,1,3,3-tetramethyl-1-[3-(trimethoxysilyl)propyl]-; Trimethoxy[3-(1,1,3,3-tetramethyl-1-disiloxanyl)propyl]silane; Silane, trimethoxy[3-(1,1,3,3-tetramethyldisiloxanyl)propyl]-; SIB1822.0 (common trade name reference)
EINECS	Contact for details

Quality Control

Our production of 1,1,3,3-Tetramethyl-1-[2'-(Trimethoxysilyl)Ethyl]-Disiloxane adheres to a strict quality management system. Every batch undergoes rigorous analytical testing, including GC, NMR, and Karl Fischer titration, to ensure high purity, consistent reactivity, and precise chemical composition. We provide comprehensive Certificates of Analysis (COA) with each shipment, detailing all critical parameters. Our quality commitment supports your need for reliable performance in sensitive formulations and ensures supply chain traceability and compliance.

Storage

Preserve in a tightly closed container, protected from light. This product is hygroscopic (moisture-sensitive) and must be stored under a dry, inert atmosphere (e.g., nitrogen) to prevent hydrolysis and maintain efficacy. Recommended storage temperature is between 15°C and 25°C in a cool, dry, well-ventilated area away from incompatible materials.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Density (at 20°C)	0.92 - 0.96 g/cm³
Refractive Index (n20/D)	1.390 - 1.400
Water Content (Karl Fischer)	≤ 0.1%

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