Description

2-Oxepanone, Polymer With 2-Ethyl-2-(Hydroxymethyl)-1,3-Propanediol And 1,1'-Methylenebis[4-Isocyanatocyclohexane] is a high-performance, aliphatic polyurethane prepolymer derived from ε-caprolactone, trimethylolpropane, and hydrogenated MDI. This specialized polymer is engineered to deliver exceptional weatherability, hydrolysis resistance, and mechanical properties, making it a critical component in demanding applications. It is primarily utilized by formulators in the coatings, adhesives, sealants, and elastomers (CASE) industries seeking durable, light-stable, and flexible material solutions.

Application

• High-Performance Coatings: Used as a key resin in automotive clear coats, industrial maintenance paints, and aerospace coatings where superior UV resistance and gloss retention are required.
• Elastomers and Sealants: Serves as a prepolymer for manufacturing flexible, durable elastomers, gaskets, and sealants with excellent resistance to environmental degradation.
• Adhesives: Formulated into structural and laminating adhesives that demand high strength, flexibility, and long-term durability under varying climatic conditions.
• Medical Device Coatings: Employed in biocompatible coatings for medical devices due to its stability and potential for creating tailored surface properties.
• Composite Materials: Acts as a matrix resin or modifier in fiber-reinforced composites to enhance toughness and environmental resistance.
• Specialty Inks and Overprint Varnishes: Provides scratch resistance and flexibility in high-end printing and packaging applications.

Basic Information

Product Name	2-Oxepanone, Polymer With 2-Ethyl-2-(Hydroxymethyl)-1,3-Propanediol And 1,1'-Methylenebis[4-Isocyanatocyclohexane]
CAS No.	68650-91-9
Molecular Formula	(C6H10O2·C6H14O3·C15H22N2O2)n
Molecular Weight	Varies (Polymer)
Synonyms	Poly(ε-caprolactone-co-trimethylolpropane-co-hydrogenated MDI); Aliphatic Polyester Polyurethane Prepolymer; Hydrogenated MDI-based Polyurethane Resin; Polycaprolactone Polyol Urethane Polymer; TMP-initiated Polycaprolactone Urethane; H12MDI Polyurethane Prepolymer; Light-stable Polyurethane Resin; CAS 68650-91-9
EINECS	Contact for details

Quality Control

Our production of this polyurethane prepolymer adheres to strict quality management systems to ensure batch-to-batch consistency and performance reliability. Key parameters such as NCO content, viscosity, hydroxyl value, and color are rigorously monitored. A comprehensive Certificate of Analysis (COA) detailing specification conformance is provided with each shipment to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at temperatures between 15°C and 25°C (59°F and 77°F). Keep the container tightly sealed when not in use to prevent moisture absorption, which can lead to premature reaction and gelation. Isolate from strong acids, bases, and oxidizing agents.

Specification

Item	Specification
Appearance	Colorless to pale yellow viscous liquid
NCO Content	Contact for details
Viscosity @ 25°C	Contact for details
Hydroxyl Value (mg KOH/g)	Contact for details
Color (Gardner)	≤ 2
Solid Content	~100%
Identification (IR)	Conforms

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