Description

(3-Glycidoxypropyl)-1,1,3,3-Tetramethyldisiloxane is a versatile organosilicon compound featuring both epoxy and siloxane functional groups, making it a highly effective coupling agent and reactive intermediate. Its primary value lies in its ability to form durable bonds between inorganic materials and organic polymers, enhancing composite performance. This chemical is essential for manufacturers in the adhesives, sealants, coatings, and electronics industries seeking to improve material adhesion, moisture resistance, and mechanical strength.

Application

• Adhesive & Sealant Formulation: Acts as a key adhesion promoter and crosslinking agent in epoxy, silicone, and polyurethane systems, significantly improving bond strength to glass, metals, and ceramics.
• Surface Modification & Primers: Used to treat filler surfaces (e.g., silica, glass fibers) and substrate primers to enhance the compatibility and interfacial adhesion in composite materials.
• Electronic Encapsulants & Potting Compounds: Serves as a critical component in silicones for electronic protection, improving moisture resistance and thermal stability of encapsulated devices.
• Fiberglass & Reinforced Plastics: Functions as a sizing or finishing agent for glass fibers to improve resin wettability and the mechanical properties of the final composite.
• Specialty Coatings: Incorporated into coatings to provide excellent substrate adhesion, corrosion resistance, and durability, particularly for demanding industrial environments.
• Silicone Modification: Used as a reactive intermediate to introduce epoxy functionality into silicone polymers, tailoring properties for specific applications.

Basic Information

Product Name	(3-Glycidoxypropyl)-1,1,3,3-Tetramethyldisiloxane
CAS No.	17980-29-9
Molecular Formula	C11H26O4Si2
Molecular Weight	278.50 g/mol
Synonyms	Glycidoxypropyltetramethyldisiloxane; 3-(2,3-Epoxypropoxy)propyl-1,1,3,3-tetramethyldisiloxane; 1,3-Bis(3-glycidoxypropyl)-1,1,3,3-tetramethyldisiloxane (common misnomer); Epoxy-functional disiloxane; SCA-EPS; Silane coupling agent EPS; Dynasylan GLYEO; A-187 (related but different structure, often confused)
EINECS	241-934-8

Quality Control

Our (3-Glycidoxypropyl)-1,1,3,3-Tetramethyldisiloxane is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including assay, epoxy value determination, and impurity profiling, to ensure high purity and consistent performance. Certificates of Analysis (COA) detailing all specifications are provided with every shipment to support your quality assurance and regulatory compliance needs.

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). Keep away from heat, sparks, and open flame. Due to its epoxy functionality, prolonged exposure to moisture or acidic/basic conditions should be avoided to prevent premature polymerization or hydrolysis.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms
Assay (GC)	≥ 97.0%
Epoxy Value	Contact for details
Refractive Index (n20D)	1.427 - 1.432
Density (20°C)	0.98 - 1.00 g/cm³

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