Unilink® is Dorf Ketal‘s specialized line of organometallic catalysts and aromatic diamine chain extenders developed to provide formulators with precise control over cure profiles, mechanical properties, and process efficiency in polyurethane and polyurea systems.
With decades of proven use in the CASE (Coatings, Adhesives, Sealants, and Elastomers) industry, Unilink® catalysts have replaced traditional mercury and tin-based systems, offering safer and more stable alternatives without compromising performance.
Unilink® solutions are trusted by formulators worldwide for delivering superior performance, safety, and process consistency across polyurethane elastomer and foam systems.
Optimized cure kinetics for both fast and delayed reactions
Compatibility with a wide variety of isocyanates and polyols
Formulation flexibility for high-resilience foams and coatings
Enhanced HSE profile—mercury- and tin-free technology
Excellent handling, moisture tolerance, and shelf stability
Zirconium-based catalysts that deliver fast cure profiles similar to tin systems. Ideal for filled and unfilled cast elastomers using either aliphatic or aromatic isocyanates. It offers excellent mold productivity and is suitable for color-sensitive formulations.
Titanium-based catalysts are designed to mimic mercury systems' delayed reactivity and sharp final cure. Offers a wide formulating window and exceptional mechanical performance across diverse elastomer and coating applications. It has high moisture tolerance and excellent storage stability.
Aromatic diamine chain extenders are tailored for flexible polyurethane foams and elastomeric coatings. These grades improve compressive strength, tensile and tear resistance, dimensional stability, and mold flow while reducing cycle times and foam density.
Replaces toxic metal catalysts with safer zirconium and titanium alternatives, ensuring regulatory compliance and safer handling.
Provides precise reactivity control—from fast cure to delayed set—suited for complex polyurethane and polyurea formulations.
Enhances tensile strength, tear resistance, and dimensional stability in elastomers, foams, and coatings.
Compatible with a broad range of isocyanates and polyols, supporting aliphatic, aromatic, filled, or color-sensitive systems.
Boosts mold flow, shortens cure cycles, and enables higher throughput in casting and foam production.
Delivers robust performance even in high-humidity environments with long shelf life and easy handling.
Dorf Ketal develops high-performance chemical technologies designed to enhance efficiency, reliability, and sustainability across a wide range of industrial applications.