Covestro develops reliable UV protection for plastic composites

Towards the sun

Numerous possibilities for outdoor applications
Towards the sun
The parts are side elements in Sortimo’s new System-Unit

With their combination of high strength and low weight, composites can be put to diverse uses in a variety of applications and industries, where they can even replace conventional materials such as metal and wood. At the K 2016 plastics trade fair, Covestro will be unveiling innovative and sustainable solutions based on fiber-reinforced polyurethanes and polycarbonates. To fully exploit the advantages of composites, the fibers must be combined with the best-possible matrix material. Polyurethanes are steadily gaining ground in this segment thanks to their outstanding properties.

At K 2016, Covestro is introducing a new polyurethane matrix for composites with very good UV, weathering and chemical resistance. Named Desmocomp®, it is formulated from aliphatic isocyanates and ideally suited to outdoor applications. It eliminates the need for any additional surface protection, such as coatings, UV absorbers, and UV-stable mats or films.

Advantageous properties

The new matrix material can be processed extremely cost-efficiently, thanks above all to its long pot life and rapid curing. Like other polyurethane materials, Desmocomp® also displays high reactivity, variable viscosity and outstanding bonding strength. It wets a composite’s glass fibers very effectively, lending it high and lasting strength. The anti-graffiti properties and good flame retardance of the composites round out the profile.

All of these advantages together open up promising opportunities for the use of Desmocomp® in a variety of outdoor applications. One current example is parts for lightweight commercial vehicles. Covestro’s development partner, Sortimo International GmbH, is presenting composite parts made with the new matrix material at the IAA commercial vehicle show from September 22 to 29 in Hanover, Germany.

The parts are side elements in Sortimo’s new System-Unit, which displays high stability, durability and a weatherproof design, and therefore is the ideal option for storage in pick-ups and flat-bed trucks.

Visit us at the K 2016 plastics trade fair in Düsseldorf, Hall 6, Stand A 75, from October 19 to 26, 2016. Find more information at

About Covestro
With 2015 sales of EUR 12.1 billion, Covestro is among the world’s largest polymer companies. Business activities are focused on the manufacture of high-tech polymer materials and the development of innovative solutions for products used in many areas of daily life. The main segments served are the automotive, electrical and electronics, construction and the sports and leisure industries. Covestro, formerly Bayer MaterialScience, has 30 production sites around the globe and employs approximately 15,700 people (full-time equivalents) as of the end of 2016.

This press release is available for download from the Covestro press server at

Find more information at

Forward-looking statements
This press release may contain forward-looking statements based on current assumptions and forecasts made by Covestro AG. Various known and unknown risks, uncertainties and other factors could lead to material differences between the actual future results, financial situation, development or performance of the company and the estimates given here. These factors include those discussed in Covestro’s public reports which are available on the Covestro website at Covestro assumes no liability whatsoever to update these forward-looking statements or to conform them to future events or developments.