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For Immediate Release

Bayer MaterialScience LLC highlights environmentally friendly, graffiti-resistant coatings

February 24, 2010

Pittsburgh, February 24, 2010 — New formulations of traditional waterborne polyurethane coatings have evolved to be more environmentally friendly, while also better meeting the requirements of bridge coating engineers. This addresses the industry's increasing demand for sustainable products while opening the door for coatings customization.

Steven Reinstadtler, market development manager – Construction and Green Building Initiative, Bayer MaterialScience LLC, presented his paper, "Environmentally Friendly Graffiti Resistant Coatings," at PACE 2010 in Phoenix. His presentation focused on the latest innovations in true two-component (2K) waterborne polyurethane coatings for graffiti-resistant applications on metal bridge infrastructure as well as concrete abutments.

As part of his research, Reinstadtler considered several 2K waterborne resins systems from Bayer MaterialScience LLC for use in anti-graffiti applications because of their desirable physical traits, including:

Near-zero volatile organic compound (VOC) formulas with excellent abrasion, chemical and weathering resistance;
No odor when applied in the field with other trades or pedestrians present;
Adjustable gloss levels - from high gloss to matte; and
Ability to be used as an acceptable topcoat for other primers and midcoats.

Test panels were prepared for anti-graffiti and physical testing of the experimental coatings. Based on the excellent abrasion, chemical and weathering resistance data that was observed, several areas of coatings used in the built environment could be targeted for further testing, including aliphatic light- and weather-stable topcoats for anti-graffiti coatings on steel and concrete infrastructure, as well as industrial, commerical and architectural areas.

Reinstadtler noted that during testing, the 2K waterborne coatings achieved the desired physical properties and traits, while greatly reducing the VOC, hazardous air pollutants (HAPS) and solvent levels, along with the possibility of heavy metal catalysts. These second generation waterborne polyurethane coatings are also primarily waterborne – having only 0-20g/L VOC levels. Additionally, both the gloss and matte guide formulas displayed very low abrasion and odor, while exhibiting excellent resistance to industrial and commercial chemicals.

Through further testing, Reinstadtler pinpointed the ability to adjust the gloss level by varying the ratio of the two waterborne resins. With the ability to vary gloss levels, designers can utilize a desirable higher gloss level on bridge steel and a lower gloss level on abutments and pilings.

In his presentation, Reinstadtler concluded that the research and testing demonstrates it is possible to create true waterborne coatings that meet or exceed the industry standards for durability and cleanability while also reducing VOC levels, solvents and other hazardous substances. "This is advantageous, as it fulfills the market need for more sustainable and greener building practices," says Reinstadtler.

Bayer MaterialScience LLC is one of the leading producers of polymers and high-performance plastics in North America and is part of the global Bayer MaterialScience business with nearly 15,100 employees at 30 sites around the world and 2008 sales of 9.7 billion euros. 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, medical, and sports and leisure industries.

For more information about Bayer MaterialScience LLC's coatings, adhesives or specialties, call 412-777-3983, e-mail naftainfo@bayerbms.com or visit www.bayermaterialsciencenafta.com.

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Media Contact(s)
Name:	Thomas Erdner
Phone:	412-777-5200
Company:	Bayer MaterialScience
Email:	thomas.erdner@bayerbms.com