Bayer Aktiengesellschaft

Bayer Materialscience Ag

Daniel Seidlitz

Norbert Eisen

Andreas Hoffmann

Hubert Ehbing

Frank Schauseil

The present invention relates to a photovoltaic solar module, a process for the preparation thereof, and a device for generating electric energy employing such a solar module. The photovoltaic solar module has a wholly or partly surrounding frame of polyurethane which is characterized in that said frame has an elongation at break of at least 50%, a modulus of elasticity of at least 30 N/mmand a coefficient of thermal expansion of up to &#x3b1;=80&#xd7;10/K, the modulus of elasticity and the coefficient of thermal expansion each being measured parallel to the edges of the module.

Photovoltaic solar module having a polyurethane frame

The invention provides a process for the production of flexible to semi-rigid polyurethane shaped articles with a compacted edge zone of given hardness and a significantly more flexible cell core, so-called integral foams, in which non-combustible mixtures of fluoroalkanes which comprise 1,1,1,3,3-pentafluorobutane (R 365mfc) are employed as physical blowing agents.

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Rösrath, Germany

Daniel Seidlitz