Description

2-Oxepanone, Polymer With 1,3-Diisocyanatomethylbenzene And α-Hydr o-ω-Hydroxypoly(Oxy-1,2-Ethanediyl) is a specialized polyurethane prepolymer or block copolymer, synthesized from ε-caprolactone (2-oxepanone), a diisocyanate, and a polyether diol. This engineered material is valued for its unique balance of flexibility, toughness, and chemical resistance, derived from its segmented polymer structure. It is primarily sought by manufacturers in the adhesives, sealants, coatings, and thermoplastic polyurethane (TPU) elastomer industries for formulating high-performance products.

Application

• High-Performance Adhesives & Sealants: Used as a key prepolymer component in moisture-curing polyurethane systems for construction, automotive, and industrial bonding applications.
• Specialty Coatings: Serves as a resin modifier in coatings to enhance flexibility, abrasion resistance, and durability on substrates like plastics, metals, and concrete.
• Thermoplastic Polyurethane (TPU) Elastomers: Acts as a building block in the production of TPUs for applications requiring a combination of elasticity and strength, such as cables, hoses, and industrial belts.
• Elastomer Modification: Employed as an impact modifier or compatibilizer to improve the toughness and low-temperature performance of other polymer blends.
• Medical Device Components: Potential use in biocompatible applications due to the hydrolyzable ester linkages from caprolactone segments, subject to specific purity grades and regulatory approval.
• Fiber & Textile Finishing: Utilized in coatings for synthetic fibers to impart water repellency, softness, and improved handling characteristics.

Basic Information

Product Name	2-Oxepanone, Polymer With 1,3-Diisocyanatomethylbenzene And α-Hydr o-ω-Hydroxypoly(Oxy-1,2-Ethanediyl)
CAS No.	67875-46-1
Molecular Formula	Contact for details
Molecular Weight	Variable (Polymer)
Synonyms	Poly(ε-caprolactone-co-polyethylene glycol-co-toluene diisocyanate); Caprolactone-PEG-TDI copolymer; Poly(CL-co-PEG-co-TDI); Polyurethane prepolymer based on caprolactone and PEG; Poly(ε-caprolactone)-block-poly(ethylene glycol)-block-poly(toluene diisocyanate); PCL-PEG-TDI triblock copolymer; PEG terminated with caprolactone and TDI; Aliphatic-aromatic polyester-urethane block copolymer
EINECS	Contact for details

Quality Control

Our production of this advanced polymer adheres to strict quality management protocols to ensure batch-to-batch consistency and performance reliability. Key parameters such as NCO content, hydroxyl value, viscosity, and molecular weight distribution are rigorously monitored. A comprehensive Certificate of Analysis (COA) detailing these specifications is provided with each shipment 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 moisture-sensitive (hygroscopic) and may react with atmospheric moisture; ensure containers are sealed under dry conditions (e.g., under nitrogen blanket) after each use. Keep away from strong acids, bases, and oxidizing agents.

Specification

Item	Specification
Appearance	Colorless to pale yellow viscous liquid or solid
Identification (IR)	Conforms to structure
NCO Content	As per grade (e.g., 2.0 - 6.0 %)
Hydroxyl Value (mg KOH/g)	As per grade
Viscosity @ 25°C (cP)	Specified range
Moisture Content (KF)	< 0.05 %
Molecular Weight (GPC)	Mn, Mw as per grade

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