Basf Aktiengesellschaft

Basf Se Corporation

Holger Leifheit

Franz Xaver Redl

Georg Partusch

Cord Schmalkuche

Thomas Stuehrenberg

Martin Lange

Thomas STÜHRENBERG

Wolfgang Pohl

Wei Liang Chien

Stefan Quaiser

The present invention relates to a process for repairing top layers for roads, tracks, and other areas used by traffic, by applying an amount of at least 20 g/mof a polymeric material to the damaged site, applying an amount of at least 80 g/mof a first polyurethane reaction mixture (which can comprise additives) to the polymeric material, and applying, to the first polyurethane reaction mixture, a mixture comprising mineral aggregate and a second polyurethane reaction mixture, and allowing the material to harden. The present invention further relates to a repair kit for repairing top layers for roads, tracks, and other areas used by traffic.

Process for repairing road surfacing systems, in particular for open-pore asphalts

The present invention relates to a spray-polyurethane system which comprises a polyol component (A) and an isocyanate component (B), where the polyol component (A) comprises a1) at least one compound reactive with isocyanate, a2) at least one reactive chain extender having at least two groups reactive toward isocyanates, where at least one group reactive toward isocyanates is a free, primary NHgroup, and also a3) at least one metal catalyst, and a4) if appropriate, further additives, where the spray-polyurethane system comprises no amine catalyst. The present invention moreover relates to a process for production of a backing layer composed of polyurethane for moldings and to the use of this backing layer for production of automobile parts. Inventive backing layers have good mechanical properties, and low emissions, and their demolding time is small when compared with the open assembly time.

Low-emission polyurethane backing layer, spray polyurethane system for producing such a backing layer, and use of such a backing layer

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Osnabrueck, Germany

Holger Leifheit