ETERNATHANE® is UBE’s high-performance series of polycarbonate-based, isocyanate-terminated prepolymers developed for polyurethane systems that demand exceptional durability and resistance in extreme conditions. Thanks to its customizable polycarbonate and isocyanate composition, this series offers a broad range of free NCO contents and viscosities, enabling tailored solutions for a variety of industrial and technical applications.
Unlike conventional polyurethane systems, ETERNATHANE®-based materials maintain their performance over time, even when exposed to aggressive environments such as heat, water, chemicals, and UV radiation. Comparative testing shows that ETERNATHANE® retains its tensile strength significantly better than polycaprolactone- or PTMEG-based polyurethanes, helping reduce maintenance, extend product life, and improve reliability in long-term use.
Its mechanical properties are complemented by excellent chemical resistance, hydrolytic stability, and abrasion performance. ETERNATHANE® also offers long-lasting transparency, making it suitable for applications where both clarity and toughness are required. Key end uses include cast elastomers, wheels, gaskets, rollers, seals, and components for oil and mining industries.
ETERNATHANE® can be used in both machine and manual processing environments. To ensure proper mixing, reactivity, and curing, the document outlines detailed casting procedures, including temperature guidelines, stirring times, and post-curing recommendations. When used with UBE’s ETERNACURE curatives, manufacturers gain even greater flexibility in adjusting final properties such as hardness, elasticity, and reactivity.
Multiple product grades are available—including bio-based options—covering a wide range of physical properties and Shore hardness levels. Packaging is offered in convenient formats from 1 kg samples to 220 kg drums, accommodating both formulation development and full-scale production.
To explore all technical details, performance data, and processing recommendations, fill out the form and download the full document. Discover how ETERNATHANE® can elevate the performance of your polyurethane systems.
