Waterborne PU dispersions (PUDs)
See also: Textiles, Leather and Nonwovens · Footwear
What it is
Waterborne polyurethane dispersions (PUDs) are systems where pre-formed polyurethane particles are dispersed in water rather than dissolved in organic solvent. The technology replaces solvent-based coatings, adhesives and surface treatments, offering comparable or superior performance with much lower emissions.
The technology was developed in the 1970s-80s and gained mass in the last decade with regulatory pressure for VOC reduction. In 2025 and beyond, PUDs are rapidly replacing solvent-based systems in multiple applications: wood coatings (furniture, flooring), leather treatment, textile coatings, coatings on technical fabrics, flexible adhesives, premium architectural paints.
1K PUD systems are simpler (ready for use after dilution), while 2K PUDs combine aqueous dispersion with hardener for superior performance in demanding industrial applications. Recently, hybrid systems (PUD combined with acrylic) offer a combination of properties from both technologies.
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Value proposition
Commercial arguments for PUD adoption:
- Immediate regulatory compliance: meets current and future VOC regulations without reengineering
- Occupational air quality: applicators and workers in PUD environments have significantly lower exposure to toxic solvents
- Verifiable sustainability: carbon footprint, absence of VOCs, compliance with ESG certifications from corporate clients
- Performance: gap with solvent-based has closed significantly in the last 5 years
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