Pittsburgh – Sept. 11, 2008 – Bayer MaterialScience LLC recently introduced its proven family of Blendur® polyurethane resin systems to the North American market at the COMPOSITESWORLD Expo, held Sept. 3-5 in the Renaissance Schaumburg Hotel and Convention Center, Schaumburg, Ill.

High glass transition temperatures combined with low smoke and fire spread ratings have proved Blendur® resin systems particularly well-suited for high-heat applications in the European aerospace, automotive, rail and electrical markets since the 1970s. Blendur® resin systems are marketed under BaySystems™, the umbrella brand for the global polyurethane systems operations of Bayer MaterialScience.

Versatile Blendur® resin systems can be custom formulated to meet the precise requirements of the most demanding composite applications. The one- and two-component systems can be made with viscosities ranging from 30 to 2,500 mPas, and with pot life and gel times between 10 minutes and six hours. The Blendur® resin system can even be made to react at room temperature.

This flexibility enables a molder to take full advantage of a Blendur® resin system’s combination of unique properties, including:

Low thermal expansion Chemical and hydrolysis resistance High glass transition temperature of approximately 280◦C High heat resistance up to approximately 240◦C High long-term thermal stability at over 200◦C Excellent mechanical and electrical properties up to approximately 200◦C

Composite materials made from Blendur® resin systems also have good inherent fire performance properties that can be improved even further by adding flame retardants.

Another advantage is that a Blendur® resin system can be produced using common thermoset manufacturing processes such as resin transfer molding, vacuum-assisted resin infusion, filament-winding, pultrusion, prepreg manufacture, mold construction, casting and injection molding.

“The Blendur® system provides a wealth of possibilities for producing composite parts that offer an excellent combination of properties in the high-temperature range, yet can be processed with existing manufacturing equipment and standard processing technologies,” said Craig Snyder, market channel representative, Bayer MaterialScience LLC. “We are pleased to harness our global resources to make these tried and true Blendur® resin systems available to the North American market,” added Snyder.

Effective March 1, 2007, Bayer MaterialScience has combined its entire global polyurethane systems business under the umbrella brand of BaySystems™. This change affects not only existing product brands in this segment – including Blendur® – but also the global network of polyurethane systems houses. More information about BaySystems™ can be found at www.bayer-baysystems.com.

About Bayer MaterialScience
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 15,400 employees at 30 sites around the world and 2007 sales of 10.4 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. Our inorganic basic chemicals unit produces chlorine and related essential products for the chemicals industry. Let us give life to your vision. Bayer MaterialScience – Where VisionWorks.

Bayer Corporation, headquartered in Pittsburgh, is a subsidiary of Bayer AG, an international health care, nutrition and high-tech materials group based in Leverkusen, Germany. In North America, Bayer had 2007 net sales of 8.1 billion euros and employed 16,800 at year end. Bayer’s three subgroups, Bayer HealthCare, Bayer CropScience and Bayer MaterialScience, improve people’s lives through a broad range of essential products that help diagnose, prevent and treat diseases; protect crops and enhance yields; and advance automobile safety and durability.

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