SiwoPUD®-2309

When flexibility, adhesion, and softness matter most—SiwoPUD-2309 delivers. This cationic, aqueous aliphatic polyurethane dispersion based on polyether is engineered for cost-effective performance in leather primers and fabric processing applications. Whether you’re working on smooth hides or complex textiles, this waterborne formulation offers the stability and surface uniformity you need without compromising on quality or sustainability.

Supplied as a 35% dispersion in water, SiwoPUD-2309 is designed to apply evenly and form a soft, resilient film that bonds well to varied substrates. Its appearance is translucent, and its non-volatile content is 35±1%, striking a perfect balance between build and flow. With a cationic ionicity and pH value between 3.5 and 5.5, this dispersion is formulated for optimal interaction with negatively charged surfaces—an ideal property when working with certain leather finishes or fabric bases.

Performance-wise, SiwoPUD-2309 holds its own. The coating stretches effortlessly with elongation between 900–1000%, and its tensile strength of 5.1 MPa ensures the film remains intact under stress. The elasticity modulus at 100% sits at 1.0 MPa, delivering the right amount of give for dynamic applications. This polyurethane dispersion also boasts excellent shear stability and is non-yellowing, maintaining a clean appearance even after exposure to light or aging.

Importantly, SiwoPUD-2309 is NMP, NEP, and DMAC-free, making it safer for workers and better for the environment. The product contains no preservatives, and should be stored in frost-free conditions in tightly sealed containers to preserve its integrity.

If you’re in need of a soft, stable, and solvent-free primer that pairs beautifully with leather or fabric, SiwoPUD-2309 is your answer. It’s a modern solution built for high-performance coating systems—simple, effective, and ready to meet your application needs.