WATER OFF A DUCKS BACK

Daimler-Benz researchers are currently testing a new type of coating that makes drops of water roll off windows like water off a ducks back.

The hydrophobic (water repellent) layer consists of an organic compound of silicon that is chemically bonded to the glass surface. This process is claimed to make the layer more durable than with conventional hydrophobic agents.

The increased surface tension renders the window surface practically unwettable, and water droplets immediately assume the form of tiny spheres. Thanks to their minimal area of contact, they are easily removed from the windows of moving vehicles by the air stream.

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