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New Polyurethane Coatings for Catheters, Endoscopes and More

Published on 2008-04-14. Author : SpecialChem

Leverkusen -- With their extraordinary adaptability and versatility, coatings made of polyurethane (PU) have conquered one area of application after another since their invention over 70 years ago. They are now poised for their next coup: They will soon be used to give such articles as catheters, leads and endoscopes particularly low-friction surfaces that are also resistant to mechanical and thermal stresses. As Dr. Jürgen Köcher, an expert at Bayer MaterialScience, reported today at the European Coatings Conference (ECC), Medical Coatings and Adhesives, in Berlin, the company is currently developing hydrophilic (having an affinity for water) PU coatings for medical devices. "The reduced friction makes devices coated with these materials particularly safe and easy to handle. For the patients, this means less pain," says Köcher.

There are two ways to manufacture the new coatings: One method uses waterborne PU dispersions, the other PU solutions. The waterborne coatings are particularly hydrophilic, whereas the solventborne coatings are further characterized by excellent mechanical stability (wet strength).

"Our objective is to offer the first commercial products for the coating of medical devices within the next few months," says Dr. Michael Mager, Head of the Medical Coatings and Adhesives unit of the Innovation and Business Creation division. Bayer MaterialScience is already providing samples of the new PU raw materials to select customers.

The new dispersions and solutions can be applied to medical devices or implants by means of spraying, dipping or virtually any other method. The resulting coatings exhibited no cytotoxicity in in vitro tests according to DIN 10933-5. "Blood compatibility studies were also successful. The coatings caused minimal activation of the coagulation cascade and platelets," reports Köcher.

About Bayer MaterialScience:

With 2007 sales of EUR 10.4 billion (continuing operations), Bayer MaterialScience 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. Bayer MaterialScience has 30 production sites around the globe and employed approximately 15,400 people at the end of 2007. Bayer MaterialScience is a Bayer Group company.

Forward-Looking Statements

This news release may contain forward-looking statements based on current assumptions and forecasts made by Bayer Group or subgroup management. 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 Bayer's public reports. The company assumes no liability whatsoever to update these forward-looking statements or to conform them to future events or developments.

Source: Bayer MaterialScience


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