BASF launches new coatings for rotor blades

The coatings recently passed an external 50 hours rain erosion test by an institute from Denmark.

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BASF, Ludwigshafen, Germany, has launched new coatings for rotor blades: RELEST Wind LEP S. The coatings recently passed an external 50 hours rain erosion test by an institute from Denmark. The stress loads the rotor blades were exposed to during the operation were speeds of up to 300 kilometers per hour at the blade tips.

Weather influences such as rain, snow, hail, sand, heat and UV radiation can wear out the blades and lead to more frequent repair and maintenance intervals. To prevent the material from damages caused by these influences, the coatings division of BASF has developed a system consisting of a gel coat, a filler, an edge protection and a topcoat. It is based entirely on solvent-free, two-component polyurethane compounds, complying with present VOC directives.

The recent test showed that with a speed of up to 160 m/s (approx. 570 km/h), the rain did not cause any significant damage on the coating. The material is virtually solvent-free as well as being durable and UV stable. Suited for OEMs, the material can be applied directly on the rotor blade.