Description

1,1,1,3,5,7,7,7-Octamethyl-3,5-Bis[3-(Oxiranylmethoxy)Propyl]Tetrasiloxane is a high-purity, multi-functional organosilicon compound featuring reactive epoxy groups on a flexible siloxane backbone. This unique molecular architecture provides exceptional versatility as a reactive intermediate, crosslinker, and modifier in advanced polymer systems. It is essential for formulators and manufacturers in the coatings, adhesives, sealants, and electronics industries seeking to enhance material properties such as adhesion, flexibility, and chemical resistance.

Application

• Epoxy Resin Modification: Acts as a flexibilizer and toughening agent to reduce brittleness and improve impact resistance in epoxy-based coatings, composites, and encapsulants.
• Silicone Hybrid Polymers: Serves as a key building block for synthesizing specialty silicone-epoxy copolymers with tailored thermal and mechanical properties.
• Adhesive & Sealant Formulations: Used as a reactive diluent and crosslinker to enhance adhesion to difficult substrates and improve the elasticity of cured products.
• Surface Treatment & Coupling Agent: Improves the interfacial bonding between organic polymers and inorganic materials like glass, metals, or minerals.
• Electronic Encapsulation: Employed in potting compounds and conformal coatings to provide moisture resistance and stress relief for sensitive electronic components.
• UV/EB Curable Systems: Functions as a low-viscosity, reactive monomer that can be polymerized under radiation to form durable, cross-linked networks.

Basic Information

Product Name	1,1,1,3,5,7,7,7-Octamethyl-3,5-Bis[3-(Oxiranylmethoxy)Propyl]Tetrasiloxane
CAS No.	69155-42-6
Molecular Formula	C22H48O6Si4
Molecular Weight	537.0 g/mol
Synonyms	Epoxy-Functional Siloxane; 3,5-Bis(3-glycidoxypropyl)-1,1,1,3,5,7,7,7-octamethyltetrasiloxane; Glycidoxypropyl-Terminated Polydimethylsiloxane; Epoxy Silicone Oil; Epoxy-Modified Siloxane; Tetrasiloxane, 1,1,1,3,5,7,7,7-octamethyl-3,5-bis[3-(oxiranylmethoxy)propyl]-; Silane, bis[3-(oxiranylmethoxy)propyl]tetramethyltetrasiloxanyl-terminated
EINECS	Contact for details

Quality Control

Our 1,1,1,3,5,7,7,7-Octamethyl-3,5-Bis[3-(Oxiranylmethoxy)Propyl]Tetrasiloxane is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure consistency, purity, and performance. Key parameters such as epoxy equivalent weight, viscosity, and purity are verified. A Certificate of Analysis (COA) documenting these results is provided with every shipment to guarantee compliance with your specifications and industry standards.

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 when not in use to prevent degradation from atmospheric moisture. Keep away from heat, sparks, and open flame.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (Epoxy Value)	≥ 95.0%
Purity (GC)	≥ 98.0%
Viscosity @ 25°C	Contact for details
Specific Gravity @ 25°C	Contact for details
Refractive Index @ 25°C	Contact for details
Water Content (KF)	≤ 0.1%

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