Description

Tris[(3-Ethyl-3-Oxetanyl)Methyl] Phosphite is a specialized organophosphorus compound featuring three reactive oxetane rings, making it a valuable multifunctional monomer and crosslinking agent. Its core value lies in its ability to undergo cationic ring-opening polymerization, enabling the formation of highly crosslinked, high-performance polymer networks with excellent thermal and chemical resistance. This product is essential for manufacturers in the advanced coatings, adhesives, and specialty polymer industries seeking to enhance material properties such as hardness, adhesion, and durability.

Application

• UV-Curable Coatings & Inks: Acts as a reactive diluent and crosslinker in cationic UV-curing formulations for wood, metal, and plastic coatings, providing low shrinkage and improved flexibility.
• High-Performance Adhesives & Sealants: Used to formulate adhesives with enhanced thermal stability and chemical resistance for demanding automotive and aerospace applications.
• Fiber-Reinforced Composites: Serves as a matrix resin component, contributing to the superior mechanical properties and environmental resistance of composite materials.
• Electronic Encapsulants & Potting Compounds: Imparts excellent electrical insulation, moisture resistance, and thermal endurance to protective materials for electronic components.
• Photoresists & Optical Materials: Utilized in the synthesis of polymers for advanced photoresists and optical lenses due to its ability to form clear, stable networks.
• Flame Retardant Additive: Functions as a reactive phosphorus-based flame retardant, enhancing the fire resistance of various polymeric materials.

Basic Information

Product Name	Tris[(3-Ethyl-3-Oxetanyl)Methyl] Phosphite
CAS No.	39865-35-5
Molecular Formula	C18H33O9P
Molecular Weight	424.43 g/mol
Synonyms	Tris[(3-ethyloxetan-3-yl)methyl] phosphite; Phosphorous acid, tris[(3-ethyl-3-oxetanyl)methyl] ester; 3-Ethyl-3-(hydroxymethyl)oxetane phosphite trimer; TOXPO; Oxetane phosphite crosslinker; Tris(oxetanyl) phosphite derivative; Reactive phosphite monomer; Crosslinking agent 39865-35-5
EINECS	Contact for details

Quality Control

Our production of Tris[(3-Ethyl-3-Oxetanyl)Methyl] Phosphite adheres to stringent quality management protocols to ensure batch-to-batch consistency and high purity. Each lot is thoroughly analyzed using advanced techniques including HPLC, GC, and NMR spectroscopy. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and key physical parameters is provided with every shipment, ensuring it meets the specific requirements of your formulation and application.

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/59-77°F). This product is easily oxidized; for long-term storage, it is recommended to keep the container under an inert atmosphere (e.g., nitrogen or argon) to maintain stability and prevent degradation. Keep away from heat, sparks, and open flame.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 97.0%
Water Content (KF)	≤ 0.5%
Acid Value	≤ 1.0 mg KOH/g
Refractive Index (n20D)	1.470 - 1.480
Density (20°C)	1.15 - 1.25 g/cm³
Viscosity (25°C)	Contact for details

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