ETERNACOLL® is UBE’s specialized range of polycarbonate diols (PCDs) developed to enhance the mechanical strength, resistance, and durability of polyurethane-based materials across a wide variety of industrial applications. These diols, with their linear structure containing carbonate moieties and terminal hydroxyl groups, form a highly stable backbone for polyurethane chains, offering performance advantages over traditional polyether and polyester polyols. Their molecular structure provides significantly improved resistance to hydrolysis, heat, UV radiation, oils, and chemicals, making them ideal for demanding environments.
This product line includes multiple grades adapted to different applications and market needs. Solid, linear types such as UH deliver outstanding tensile strength and thermal stability, essential for structural elastomers and high-performance molded parts. Liquid grades like PH offer greater softness and flexibility, facilitating their use in soft touch coatings and sealants. The UHC series, combining carbonate and ester functionalities, enhances adhesion and elasticity, particularly in flexible adhesives. Other grades like UM and UC, available in high-viscosity or solid formats, provide excellent scratch resistance and surface hardness, while UT grades, formulated as carbonate-ether copolymers, improve low-temperature flexibility, a critical feature in applications exposed to cold climates or dynamic stress.
Laboratory testing confirms the long-term performance of polyurethanes made with ETERNACOLL®, which retain their mechanical properties even after extended exposure to heat, water, oils, or outdoor weathering. Compared to polyether or polyester-based systems, ETERNACOLL®-based formulations demonstrate superior retention of elasticity and strength, as well as enhanced stability in harsh conditions.
Furthermore, with a wide range of molecular weights and physical states ranging from liquids to crystalline solids, ETERNACOLL® offers formulation versatility for both rigid and flexible PU systems, allowing precise adjustment of processing behavior and final product properties.
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