Description

2-Oxepanone, Polymer With α-Hydro-ω-Hydroxypoly( Oxy-1,2-Ethanediyl) And 1,1'-Methylenebis[4-Isocyanatobenzene] CAS NO 68888-97-1 is a specialized polyurethane prepolymer or block copolymer, synthesized from ε-caprolactone (2-oxepanone), poly(ethylene glycol), and methylene diphenyl diisocyanate (MDI). This engineered material is valued for its unique combination of biodegradability, biocompatibility, and tunable mechanical properties derived from its segmented structure. It is primarily sought by manufacturers in the biomedical, specialty adhesive, and controlled-release industries seeking advanced, performance-driven polymer solutions.

Application

• Biomedical Implants & Devices: As a key component in the fabrication of biodegradable scaffolds for tissue engineering, surgical meshes, and absorbable medical devices.
• Controlled Drug Delivery Systems: Utilized to create microparticles, nanoparticles, or implantable matrices for the sustained and targeted release of pharmaceutical actives.
• Specialty Adhesives & Sealants: Serves as a high-performance, flexible prepolymer in formulations for medical-grade adhesives and moisture-curing sealants.
• Biodegradable Coatings: Applied as a functional coating for sutures, stents, or other medical tools to enhance biocompatibility and provide timed degradation.
• Advanced Elastomers: Used in the synthesis of thermoplastic polyurethane elastomers (TPUs) with enhanced hydrolytic stability and soft segment crystallinity for technical parts.
• Hydrogel Formulations: Acts as a macromer or crosslinking agent in the development of hydrogels for wound dressings and contact lenses.

Basic Information

Product Name	2-Oxepanone, Polymer With α-Hydro-ω-Hydroxypoly( Oxy-1,2-Ethanediyl) And 1,1'-Methylenebis[4-Isocyanatobenzene]
CAS No.	68888-97-1
Molecular Formula	(C6H10O2·C2H4O·C15H10N2O2)n
Molecular Weight	Variable (Polymer)
Synonyms	Poly(ε-caprolactone)-block-poly(ethylene glycol)-block-poly(ε-caprolactone) diol end-capped with MDI; PCL-PEG-PCL MDI prepolymer; MDI-terminated PCL-PEG copolymer; Poly(ethylene glycol)-poly(ε-caprolactone) copolymer terminated with methylene diphenyl diisocyanate; 4,4'-MDI capped PCL-PEG block copolymer; PEG-PCL polyurethane prepolymer; Aliphatic-aromatic polyester-urethane block copolymer; Poly(ethylene oxide)-block-polycaprolactone urethane
EINECS	Contact for details

Quality Control

Every batch of our 2-Oxepanone, Polymer With α-Hydro-ω-Hydroxypoly( Oxy-1,2-Ethanediyl) And 1,1'-Methylenebis[4-Isocyanatobenzene] is manufactured under a strict quality management system. We perform rigorous in-process and final testing to ensure consistent molecular weight distribution, functionality, and purity, which are critical for performance in sensitive applications like drug delivery and medical devices. A comprehensive Certificate of Analysis (COA) detailing key parameters such as NCO content, hydroxyl value, and residual monomer levels is provided with each shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at temperatures between 2°C and 8°C to maintain stability and prevent premature polymerization or moisture absorption. Keep away from heat, open flames, and incompatible materials such as strong bases, acids, and oxidizing agents. Under these conditions, the product is typically stable for 12 months from the date of receipt.

Specification

Item	Specification
Appearance	White to off-white waxy solid or pellets
Identification (IR)	Conforms to structure
Assay (NCO Content)	1.5 - 3.5 % (or as per grade)
Hydroxyl Value	< 5 mg KOH/g
Molecular Weight (GPC)	Specified range (e.g., 5,000 - 20,000 Da)
Residual ε-Caprolactone	< 0.1 % (HPLC)
Residual MDI Monomer	< 0.1 % (HPLC)
Moisture Content (KF)	< 0.05 %
Melting Point (DSC)	40 - 60 °C

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