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Bayer MaterialScience Develops PU Dispersions for Peel-off & Self-healing Coatings for Electronics

Published on 2013-03-13. Author : SpecialChem

LEVERKUSEN -- Polyurethane coatings formulated with Bayer raw materials have proven effective in a wide variety of applications. Smart coatings open up a whole series of additional functions, however, from the protection of sensitive electronic devices to safety functions or "intelligent" reactions to external stimuli. Such functional coatings represent a competitive advantage in a number of industrial segments. Bayer MaterialScience is drawing on its extensive know-how to keep pace with this trend toward smart coatings with innovative developments, some of which it is presenting at the European Coatings Show 2013.

One example is temporarily applied, functional coatings for mobile electronic devices such as smartphones, tablet PCs and laptops. The production process for these high-end products includes one step in which surfaces that have already been produced must be protected against chemicals, mechanical damage and dust. Experts at Bayer MaterialScience have developed dispersions and starting formulations for environmentally compatible coatings that provide this protective function. Once they have served their purpose, they can be peeled off easily with no residue left behind.

"Electronics and IT companies in Asia began using temporary functional coatings based on raw materials from the Bayhydrol® UH and Bayhydrol® UV lines in their volume production processes last year," says Anand Khot, a smart coatings expert at Bayer MaterialScience in the Asia Pacific region. The coatings cover logos and labels during the anodic oxidation of aluminum or protect sensitive displays against damage during the CNC milling process (CNC stands for computerized numerical control).

Temporary functional coatings are also of interest to the automotive and furniture industries. There are basically two possible formulations: waterborne, one-component systems or systems that cure in just a few seconds under UV light. The coatings can be applied in various ways. Because they are also sprayable, they form a perfect, easily removable protective shell even on objects with strongly curved surfaces or edges.

The portfolio also includes polyurethane dispersions for waterborne coatings with a self-healing function. In case of scratches, they can reposition themselves in their original formation and the scratch disappears, thanks to the elastic reversibility of the hydrogen bonds. As the dispersions are suitable for the coating of plastics and metals, they are used in the electronics and automotive industries, for example.

Other smart coatings not only protect a surface and give it a high-quality appearance, they also impart a soft and pleasant handle. Such soft-touch coatings can also be produced using dispersions from Bayer MaterialScience. These raw materials enable the formulation of solvent-free systems that meet exacting requirements with respect to hydrolytic, yellowing and chemical resistance.

About Bayer MaterialScience

With 2012 sales of EUR 11.5 billion, 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. At the end of 2012, Bayer MaterialScience had 30 production sites and employed approximately 14,500 people around the globe. Bayer MaterialScience is a Bayer Group company.

Forward-Looking Statements

This 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. 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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