Polyurethane Dispersions - Coatings

Polyurethane dispersions are resins supplied in water that bring a unique combination of toughness, mechanical properties and durability typically not achievable in other polymer chemistries. These resins are utilized across various surfaces and applications, including wood, metal, plastics, masonry and textiles.

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With an extensive range of innovative water-borne polyurethane dispersion technologies, Lubrizol collaborates with customers to provide adaptable and customized solutions tailored to specific needs and new regulations. Through a commitment to continuous innovation and collaboration, we focus on delivering performance, simplicity, and sustainable benefits.

Beyond traditional polyurethane dispersions, we have pioneered unique polyurethane technology utilizing patented polyamide polyols. This cutting-edge chemistry addresses many of today’s most stringent coating challenges through our Aptalon® polyamide polyurethane technology, which meets the highest performance standards, including chemical, abrasion, and aging resistance, while offering vast aesthetic appeal. Aptalon polyamide polyurethane chemistry matches solvent-borne performance while introducing simplicity with 1K, self-crosslinking systems, along with the sustainability of high bio-based carbon content.

We actively work to enhance and refine Lubrizol Sancure®, Aptalon, and Permax® polyurethane products to improve polymer properties for specific applications.

Turboset® Dispersions

Turboset® dispersions offer a distinct range of 1K, self-crosslinking systems that eliminate the necessity of external crosslinkers, achieving added simplicity. These polyurethane dispersions replicate the performance of a two-component system without needing additional crosslinkers, which is ideal for developing polyurethane coatings for wood. Additionally, we provide specialized functional polyurethane dispersions for 2K systems designed to crosslink with non-regulated crosslinkers.

Typical Applications

Lubrizol polyurethane dispersions find application in various sectors, including:

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• Paints and coatings for adhesion to various substrates in transportation, industrial OEM, protective, wood, and construction applications. They deliver 2K performance with 1K systems. The introduction of high-solid content polyurethane dispersions reduces the number of layers in multilayer coating systems. Sustainable coatings are derived from high bio-carbon content polyurethanes, enabling low VOC and globally compliant formulations. For matte finishes, inherent self-matting polyurethane dispersions eliminate the need for matting additives, ensuring no adverse effects on clarity, haze, or chemical resistance.

• Printing and packaging sectors benefit from our dispersions due to their adhesion capabilities to various substrates, delivering an excellent balance of properties such as rapid hardness, mar, scuff resistance, and chemical resistance in applications like printable primers, OPVs, ink vehicles, and heat seal processes.

• Specialty papers and nonwovens require abrasion resistance for specific applications, with a broad range from hard to soft polyurethane dispersions that meet diverse criteria such as MVTR, heat stability, heat sealability, and durability.

• Textiles utilize a comprehensive array of polyurethane dispersions, providing properties from softness and elasticity to hardness. These materials deliver inherent characteristics such as flame retardancy, excellent UV and heat stability, while balancing mechanical properties and adhesion capabilities to multiple substrates for effective pre-treatments and ink receptive coatings. Moreover, specially designed polyurethane emulsions ensure high MVTR for waterproof and breathable textiles.

Ask an Expert

Seek assistance with product recommendations, formulation inquiries, application challenges, and more from a Lubrizol expert on Polyurethane Dispersions technologies.

This review describes the fundamental chemistry, preparation process, and physical properties of aqueous polyurethane dispersions and the films derived from them, alongside the methods of post-treatment to adjust properties. The technique to render a polyurethane water-dispersible without external emulsifiers is presented. It compares four major methods of preparation and discusses ways to enhance the relatively poor water and solvent resistance of aqueous polyurethane dispersions, which stem from the hydrophilicity and linear structure of polyurethane, emphasizing acrylate incorporations.