Leverkusen, Germany - Bayer MaterialScience's Makrolon high-tech sheeting has been used in a complete overhaul of the BayArena roof - the home of German Bundesliga football team Bayer 04 Leverkusen. The sheeting features a new topcoat formulated with polyaspartic binders, the company said 29 Sept.
The disc-shaped, translucent roof has a diameter of 217 metres, with a steel support structure weighing around 3000 tonnes. The entire structure has been covered with the anti-corrosion coating, which is "based on polyaspartic raw materials," to ensure durability, Bayer said.
"It would never have been possible to keep to the tight schedule for the BayArena without this new topcoat," explains Karl-Heinz Birk, head of the coating shop at Max Bögl Bauservice GmbH & Co. KG, one of the two general contractors responsible for the rebuilding of the BayArena. "Thanks to its rapid drying, we were able to significantly increase the throughput in the workshop compared with the conventional system. Furthermore, we were able to reduce solvent emissions very considerably due to its low VOC (volatile organic compound) content."
Whereas a normal three-coat system takes about 24 hours to apply and dry, the complete application of the new two-coat system takes only six to eight hours, Bayer claims, adding that if the topcoat is based on raw materials from the Desmophen NH and Desmodur N ranges, it will contain some 40 percent less VOCs than a conventional three-coat system.
"A further bonus with this topcoat is its excellent adhesion to metal," said Markus Mechtel, a corrosion protection expert at Bayer MaterialScience. "I see enormous potential for one-coat application directly to such surfaces," he added. (RD)