Description

2-Oxepanone, Polymer With 1,3-Diisocyanatomethylbenzene And 2,2'-Oxybis[Ethanol] (CAS 51160-36-2) is a specialized polyurethane prepolymer derived from caprolactone, toluene diisocyanate (TDI), and diethylene glycol. This polymer is engineered to deliver enhanced flexibility, hydrolytic stability, and excellent adhesion to various substrates. It is a critical intermediate for formulators in the coatings, adhesives, sealants, and elastomers (CASE) industries seeking to improve the performance and durability of their final products.

Application

• High-Performance Coatings: Used as a key resin component in polyurethane coatings for automotive, industrial maintenance, and marine applications, providing excellent gloss retention and chemical resistance.
• Adhesives & Sealants: Serves as a base polymer for formulating flexible, moisture-curing adhesives and sealants with strong bonding strength and weatherability.
• Elastomers: An essential prepolymer for manufacturing castable polyurethane elastomers used in rollers, wheels, and industrial parts requiring a balance of toughness and elasticity.
• Composite Materials: Acts as a matrix resin or modifier in fiber-reinforced composites to enhance interfacial adhesion and impact resistance.
• Textile & Leather Finishes: Employed in the production of durable, flexible finishes and coatings for synthetic leather and technical textiles.
• Potting & Encapsulation: Suitable for electronic potting compounds where moisture resistance and thermal stability are required.

Basic Information

Product Name	2-Oxepanone, Polymer With 1,3-Diisocyanatomethylbenzene And 2,2'-Oxybis[Ethanol]
CAS No.	51160-36-2
Molecular Formula	(C6H10O2 · C9H6N2O2 · C4H10O3)x
Molecular Weight	Polymer - Variable
Synonyms	Caprolactone-TDI-DEG Prepolymer; Poly(ε-caprolactone-co-toluene diisocyanate-co-diethylene glycol); TDI-Caprolactone-DEG Copolymer; Polyurethane Prepolymer based on Caprolactone, TDI, and Diethylene Glycol; Polyester-Urethane Copolymer; 2-Oxepanone polymer with 1,3-diisocyanatomethylbenzene and 2,2'-oxybisethanol; Toluene Diisocyanate-Caprolactone-Diethylene Glycol Terpolymer
EINECS	Contact for details

Quality Control

Our production of this polyurethane prepolymer adheres to strict quality management protocols to ensure batch-to-batch consistency and performance. Key parameters such as NCO content, viscosity, and residual monomer levels are rigorously monitored. A comprehensive Certificate of Analysis (COA) detailing assay, identity, and physical specifications is provided with every shipment to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. This product is hygroscopic (moisture-sensitive). Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep the container tightly sealed under a dry inert atmosphere (e.g., nitrogen) to prevent moisture absorption and premature polymerization. Isolate from strong oxidizers, acids, and bases.

Specification

Item	Specification
Appearance	Colorless to pale yellow viscous liquid
Identification (IR)	Conforms to structure
NCO Content	Contact for details
Viscosity (25°C)	Contact for details
Solid Content	~100%
Residual TDI Monomer	< 0.5% (by HPLC)
Moisture (Karl Fischer)	< 0.05%

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