Description

2-Oxepanone, Polymer With 2,2-Bis(Hydroxymethyl)-1,3-Propanediol CAS NO 35484-93-6 is a high-performance, hydroxyl-functional polyester polyol derived from ε-caprolactone and pentaerythritol. This specialty polymer is valued for its excellent hydrolytic stability, low viscosity, and superior mechanical properties in formulated systems. It is primarily sought by manufacturers in the polyurethane, coatings, adhesives, and elastomers industries for creating durable, flexible, and high-quality end products.

Application

• Polyurethane Elastomers: Used as a soft segment component to impart flexibility, toughness, and hydrolysis resistance in cast elastomers and thermoplastic polyurethanes (TPU).
• High-Performance Coatings: Serves as a key polyol in polyurethane coatings for automotive, industrial, and wood finishes, enhancing weatherability and chemical resistance.
• Adhesives and Sealants: Incorporated to improve adhesion, flexibility, and durability in moisture-curing and two-component polyurethane adhesive formulations.
• Biomedical Polymers: Utilized in the synthesis of biocompatible and biodegradable polymers for controlled drug delivery systems and medical devices.
• Resin Modification: Acts as a reactive modifier in epoxy, vinyl ester, and other resin systems to enhance impact strength and reduce brittleness.
• Specialty Plasticizers: Functions as a polymeric plasticizer for PVC and other polymers, offering low migration and permanent flexibility.

Basic Information

Product Name	2-Oxepanone, Polymer With 2,2-Bis(Hydroxymethyl)-1,3-Propanediol
CAS No.	35484-93-6
Molecular Formula	(C6H10O2)n·C5H12O4
Molecular Weight	Varies (Polymer)
Synonyms	Poly(ε-caprolactone) Pentaerythritol Star Polymer; Pentaerythritol-initiated Polycaprolactone Polyol; PCL-Pentaerythritol Polyol; Caprolactone-Pentaerythritol Copolymer; 4-Oxepanone, homopolymer, 2,2-bis(hydroxymethyl)-1,3-propanediol-initiated; Polycaprolactone Tetraol; Star-shaped Poly(ε-caprolactone); Hydroxyl-terminated Polycaprolactone Pentaerythritol Adduct
EINECS	Contact for details

Quality Control

Our production of this polycaprolactone polyol adheres to strict quality management protocols to ensure batch-to-batch consistency and performance. Each lot is characterized for critical parameters including hydroxyl value, acid value, viscosity, and molecular weight distribution. Certificates of Analysis (COA) detailing these specifications are provided with every 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 hygroscopic (moisture-sensitive). To prevent moisture absorption and potential property degradation, containers must be kept tightly sealed when not in use and under a dry inert atmosphere (e.g., nitrogen) for long-term storage.

Specification

Item	Specification
Appearance	White to off-white waxy solid or viscous liquid
Hydroxyl Value (mg KOH/g)	Contact for details
Acid Value (mg KOH/g)	≤ 2.0
Viscosity @ 60°C (mPa·s)	Contact for details
Water Content (Karl Fischer, %)	≤ 0.1
Molecular Weight (Mn, GPC)	Tailored (Typical range: 500 - 5000 g/mol)
Functionality (Theoretical)	4

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