SiwoPUD®-SWU

When your coating needs to bend, stretch, and withstand extreme conditions—all without cracking or fading—SiwoPUD-SWU is the polyurethane dispersion that delivers. Developed by Shanghai Sisheng Polymer Materials Co., Ltd., this aqueous, aliphatic polyurethane dispersion combines the best of polyether and polycarbonate chemistry to create a coating system that’s as versatile as it is tough.

Supplied at a high 60% solid content, SiwoPUD-SWU brings superior body and build with every application. The translucent-white appearance makes it easy to visualize during formulation, while its pH range of 7.0–9.5 and viscosity ≤2000 mPa·s ensure smooth processing across diverse coating lines. Better yet, it’s NMP, NEP, and DMAC free, making it a smart choice for manufacturers who prioritize sustainability without sacrificing performance.

Stretch is where this dispersion shines—boasting an impressive elongation of 1200–1300%, SiwoPUD-SWU is engineered for elasticity. Yet its tensile strength of 20.5 MPa and 100% modulus of 1.2 MPa reveal a coating that’s not just flexible, but incredibly strong under pressure. It forms a thick, resilient film that resists cracking even during aggressive mechanical foaming.

With excellent heat resistance (withstanding temperatures over 200°C without crosslinking), and robust water, alkali, and aging resistance, SiwoPUD-SWU is designed to stand the test of time. It’s a natural fit for demanding textile applications, including outerwear, bags, suitcases, high-performance gear, and other elastic coatings. The non-yellowing, dry-fast, and shear-stable properties ensure long-term aesthetic and mechanical stability.

Formulators can boost performance even further with aziridine or water-dispersible polyisocyanate crosslinkers, making it ideal for premium textile finishes. And with no organotin compounds, heavy metals, or formaldehyde, this is a coating that’s as safe as it is effective.

For a next-gen polyurethane solution that bends, bonds, and outlasts, SiwoPUD-SWU brings unmatched value to performance coating applications.