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
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Product
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Description
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Application Notes
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Unilink® 1000 series
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Zirconium‑based polyurethane catalysts for filled and unfilled cast elastomers
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• Delivers a fast cure profile, similar to tin, to maximize mold productivity in cast elastomers
• Suitable for use with aliphatic and aromatic isocyanates and all polyols • Unilink 1030 is suitable for color‑critical formulations |
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Unilink® 2000 series
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Titanium‑based polyurethane catalysts for filled and unfilled elastomers and coatings
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• Slower, delayed cure profile with a snap final cure, similar to mercury, wide formulating window and tailored polyurethane properties
• Suitable for use with a wide variety of isocyanates and primary polyols • Moisture‑tolerant and excellent storage stability in polyols |
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Unilink® 4200, 4230, and 4100
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Aromatic diamine chain extender for flexible polyurethane foams
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• Improved compressive strength, tensile, tear, dimensional stability and load‑bearing properties in standard TDI slab‑stock foam and high‑resilience foam systems
• Reduces foam density and softens cold‑molded foam • Improves mold flow and reduces mold time |
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Unilink® 4200, 4230, and 4100
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Aromatic diamine chain extender for elastomeric coatings
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• Cures TDI and MDI coating compounds at ambient temperatures
• Can be applied by spray or pour‑and‑spread techniques • Low viscosity improves handling, surface wetting, adhesion and finish |
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.
Our consultants are ready to help you maximize performance with the right catalyst and performance additives solution.