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NEW ALIPHATIC ACRYLIC POLYURETHANE COATING SYSTEM FROM BAYER MATERIALSCIENCE FEATURED AT WORLD OF CONCRETE
A new aliphatic acrylic polyurethane coating from Bayer was a key component in the complete makeover of Pittsburgh’s Wabash Tunnel, which opened for public access in December 2004 for the first time in more than 70 years. With major renovations to the infrastructure and an added 1.1 mile HOV ramp, the re-opened tunnel will alleviate congestion in otherwise backed-up arteries into the city and quell complaints about graffiti that many considered an eyesore. Bayer will feature the aliphatic acrylic polyurethane coating technology used to protect the concrete ramp supports and walls at its booth (S11541) at World of Concrete, held Jan. 18-21, 2005, in Las Vegas. To ensure that the new look of the major renovation lasts for many years to come, the Port Authority of Allegheny County worked in cooperation with Bayer MaterialScience to develop the coating system specification for both the clear and color coat that would be used on the concrete ramp supports and wall barrier for easy removal of graffiti and long-lasting protection against rain, sun, wind and cold. “We are honored to be part of this major renovation project that will help thousands of daily commuters enjoy a quicker – and more aesthetically pleasing – commute along Pittsburgh’s southwest corridor,” said Carl Angeloff, manager of market development for the Maintenance and Monomers coatings business for Bayer MaterialScience. “We are also excited about applying this anti-graffiti, protective coating system to similar concrete revitalization projects across the country,” he said. The selected color coat, Carbothane 134 HG – an environmentally friendly coating with high solids and low VOC content, was applied first. This coating, based on Bayer raw materials, has superior impact and abrasion resistance, excellent weather ability, and provides a high gloss, durable finish. Because of its excellent flow characteristics, it was applied both by brush and roller. In certain areas that were not close to heavy traffic, the coating was spray applied. For added protection, Carbothane Clear Coat AG, also based on Bayer raw materials, was applied as a finish coat. The hard finish and good depth of image of this coating system offers exceptional resistance to UV rays, and thanks to its excellent chemical abrasion resistance, maintenance is easy. Graffiti can be removed routinely from the concrete ramp supports and wall barriers with a power washer. To help facilitate adhesion of the color coat, paint contractor Superior Painting prepped the surface of the concrete with a clear water power spray at 2,000 psi. This was strong enough to remove any loose particles and dust without damaging the surface of the concrete. In all, more than 30,000 square feet of concrete was coated. According to Angeloff, the coating met all expectations. “The coating system has a clean, clear appearance that will retain its gloss and color, and withstand years of routine maintenance – providing excellent protection to the porous concrete surface,” he said. http://www.bayermaterialscience.com
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