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Polyisocyanates

A unique portfolio of building blocks

Polyisocyanates and polyols yield high-quality polyurethane coatings

Polyurethane is created by the reaction of polyisocyanates and polyols. Covestro offers the most comprehensive range of component core ingredients in the industry. Using our extensive know-how from decades of research, ongoing improvement and innovative product development, we present an unmatched product portfolio.

Polyurethane is created by the reaction of polyisocyanates and polyols. Covestro offers the most comprehensive range of component core ingredients in the industry. Using our extensive know-how from decades of research, ongoing improvement and innovative product development, we present an unmatched product portfolio.
More than 50 years ago we developed the first use of polyisocyanates for the coatings and adhesives industry. Our world-famous “DD-coatings” – based on Desmodur® (polyisocyanate) and Desmophen® (polyol) – were quickly established in numerous applications. They remain synonymous with high-quality solventborne polyurethane coating systems.

We offer polyisocyanate and polyol building blocks for almost every property profile. They are used for formulating coating or adhesive systems that can be adjusted precisely to the requirements of the final product.

Aromatic polyisocyanates are used for primers, adhesives and indoor applications, while aliphatic polyisocyanates can be used universally. Our products can be found in a variety of applications, such as:

They are also used in reactive adhesives, textile coating and construction applications .

Our products serve as crosslinkers for two-component (2K) solventborne polyurethane coatings and adhesives, blocked polyisocyanates for one-component (1K) polyurethane baking coatings, and hydrophilized polyisocyanates as crosslinkers for water-based polyurethane systems. In other words, wherever crosslinking is required to achieve high resistance and reliable adhesion under efficient conditions.

We’ve developed an entirely new isocyanate, pentamethylene diisocyanate (PDI), 70 percent of whose carbon content comes from biomass without generating any direct competition for food production. PDI offers customers a hardener component based on renewable feedstock and with improved carbon footprint, which is an important differentiator.

Additionally, our thermolatent crosslinker offers a significantly improved curing speed for 2K PU high-gloss coatings. Plastic parts can be cured at 80°C and as much as 30 percent faster while maintaining excellent appearance. The thermolatent technology allows more robust handling of plastic parts with freshly cured coating surfaces. In the longer term, the automotive industry will benefit by being able to paint plastic, composite and metal parts on a single line.

 

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