Water-Based Polyurethane Dispersions (PUD) – High-Performance Waterproof Resins

What Are Polyurethane Dispersions (PUD)?

Polyurethane dispersions (PUD) are advanced, eco-friendly materials composed of polyurethane particles dispersed in water. These dispersions use a dispersing agent between the polymer chains, making them ideal for a variety of industries, including automotive, construction, textile, packaging, and more. Their high-performance and environmentally friendly nature make them a popular choice for coatings and adhesives across many sectors.

Key Features of Water-Based Polyurethane Dispersions:

Water-based polyurethane dispersions can be formulated as coatings or adhesives that require little to no co-solvent, forming durable films at ambient temperatures. They offer exceptional adhesion to various surfaces, including glass and polymeric fibers, and come with the added benefit of being non-toxic, non-flammable, and environmentally safe, without contributing to air or water pollution.

Advantages of Water-Based PUD Systems:

1. High Mechanical Performance:
   PUD products offer superior mechanical strength compared to non-polyurethane products, delivering performance levels similar to traditional polyurethane prepolymers.
2. High Chemical Resistance:
   These dispersions exhibit exceptional resistance to hydrolysis and remain stable in aqueous environments.
3. Application on Humid Surfaces:
   Unlike polyurethane prepolymers that are moisture-sensitive, PUD systems contain water, allowing for application on damp or even wet surfaces without compromising performance.
4. UV Non-Yellowing:
   While many polyurethane prepolymers are prone to yellowing under UV exposure, PUD systems are made from aliphatic compounds, ensuring long-term UV stability without yellowing.
5. Eco-Friendly and Safe:
   PUD systems are non-flammable and contain no hazardous solvents, making them safer for both human health and the environment. This is a key advantage over traditional polyurethane prepolymer-based products, which may contain flammable solvents.