Description

Tris[(3-Ethyloxetan-3-Yl)Methoxy]Methylsilane CAS NO 76690-81-8 is a specialized organosilicon compound featuring multiple oxetane functional groups. This unique structure makes it a highly effective crosslinking agent and reactive modifier in advanced polymer formulations. It is primarily sought after by manufacturers in the coatings, adhesives, sealants, and elastomers (CASE) industries, as well as producers of high-performance composites and electronic materials, where it enhances durability, adhesion, and chemical resistance.

Application

• Crosslinking Agent for UV-Curable Coatings & Inks: Imparts excellent hardness, scratch resistance, and weatherability to surface finishes.
• Reactive Modifier in Epoxy & Acrylic Resins: Enhances thermal stability, mechanical strength, and adhesion to various substrates.
• Adhesive & Sealant Formulations: Improves flexibility, moisture resistance, and long-term durability in bonding applications.
• Fiber-Reinforced Composite Matrices: Used as a coupling agent or resin component to improve fiber-matrix interfacial strength.
• Electronic Encapsulants & Potting Compounds: Provides reliable protection with low shrinkage and good electrical insulation properties.
• Surface Treatment for Fillers & Pigments: Enhances dispersion and compatibility within polymer systems.

Basic Information

Product Name	Tris[(3-Ethyloxetan-3-Yl)Methoxy]Methylsilane
CAS No.	76690-81-8
Molecular Formula	C19H36O6Si
Molecular Weight	388.58 g/mol
Synonyms	Methyltris[(3-ethyl-3-oxetanyl)methoxy]silane; Tris(3-ethyl-3-oxetanemethoxy)methylsilane; (3-Ethyl-3-oxetanemethoxy)methylsilane trimer; Oxetane-functional silane; Silane coupling agent, oxetane; TEOX-MS; Contact for additional trade names.
EINECS	Contact for details

Quality Control

Our production of Tris[(3-Ethyloxetan-3-Yl)Methoxy]Methylsilane adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including assay, identity confirmation, and impurity profiling, to ensure consistency and high purity. Certificates of Analysis (COA) documenting all critical parameters are available upon request to support your quality assurance and regulatory 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). This product is hygroscopic (moisture-sensitive); keep the container tightly sealed to prevent contact with atmospheric moisture.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC or HPLC)	≥ 97.0%
Water Content (KF)	≤ 0.5%
Refractive Index (n20D)	1.450 - 1.460
Density (20°C)	1.05 - 1.15 g/cm³

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