SiwoPUD®-SWC

When your project calls for strength, resilience, and clean, lasting aesthetics, SiwoPUD-SWC rises to the challenge. This aqueous, aliphatic polyurethane dispersion is built on polycarbonate chemistry, engineered to deliver uncompromising durability without compromising environmental or health standards.

Supplied as a 35% solids dispersion in water, SiwoPUD-SWC forms a film that balances medium hardness with remarkable flexibility. With an elongation range of 550–650%, it handles stretching and flexing without losing its integrity. The tensile strength of 48.1 MPa and a 100% modulus of 6.8 MPa make it a tough, dependable choice for surfaces that need to withstand wear, stress, and environmental exposure.

Where it truly shines is in topcoat applications. The final film exhibits excellent heat resistance, with a melting point between 220–230°C, even without crosslinking. Whether you’re working with products exposed to high temperatures, moisture, or extreme weather, SiwoPUD-SWC is up for the task. Its water resistance, wear resistance, weather resistance, and hydrolysis resistance are top-tier, making it especially valuable in applications demanding long-lasting durability and non-yellowing performance.

Formulated without NMP, NEP, or DMAC, and free from organotin compounds, heavy metals, and formaldehyde, SiwoPUD-SWC is a safer, more sustainable option for modern coatings. It features low viscosity (≤1000 mPa·s), good shear stability, and fast drying, which ensures smooth processing and quick throughput in production environments. Its translucence-white appearance and pH range of 7.0 to 9.5 make it adaptable across different substrates and finish requirements.

For those seeking an even higher level of performance, SiwoPUD-SWC can be enhanced with aziridine crosslinkers or water-dispersible polyisocyanate crosslinkers—unlocking increased strength and chemical resistance.

Whether used on leather, synthetic materials, or industrial surfaces, SiwoPUD-SWC delivers a future-ready finish that’s as tough as it is refined. Built for environments that test limits—this polyurethane dispersion exceeds them.