Covestro Deutschland Ag

Bayer Aktiengesellschaft

Lanxess Deutschland Gmbh

Rhein Chemie Rheinau Gmbh

Thomas Kleiner

Torsten Erwe

Hermann-Josef Weidenhaupt

Thomas Gross

Hartmuth Buding

Ludger Heiliger

Winfried Jeske

Wilfried Nolte

Adolf Sicheneder

Harro Schlesmann

Thomas Fr&uuml;h

Andreas Hoffmann

Hans-Guido Wirtz

Udo Maier

Frank Grimberg

Ralf Busch

Joachim Kiesekamp

Robert-Hans Schuster

A method is provided for foaming a ballast bed of a railway track wherein the railway track comprises sleepers positioned on the ballast bed and rails positioned on the sleepers, wherein the rails are covered at least in a partial area along a region of the ballast bed to be foamed, and a foaming agent is introduced into the ballast bed while the rails are covered, wherein the ballast bed has in a sleeper bay defined by two successive sleepers an upper side facing against the gravitational direction, and the ballast bed is heaped up so that the upper side of the ballast bed reaches at least up to an underneath side of the sleeper facing in the gravitational direction.

Method for covering a ballast bed with foam in a railway track system

The invention relates to a method for producing load transferring regions in a ballast body of a track superstructure by introducing curable liquid plastics or reactive plastic mixtures from a mixing unit by means of at least two distributor pipes with outlets into the load transferring regions and allowing the plastic or the reactive plastic mixture to cure in said load transferring regions. The two distributor pipes with outlets are positioned on the left or on the right from the outside of the rails into the region between the two rails such that the outlets are located adjacent to each other and are laterally spaced from the front face () of the tie () that has the load transferring region to be reinforced. The two outlets are opened in order to allow the plastic or the reactive plastic mixture to exit at a controlled rate. Each distributor pipe outlet is guided to the respective end face (') of the tie () from the inside to the outside in a lateral manner with respect to the front face () of the tie () and around the respective end face (&#x2032;) of the tie () to the rear face () of the tie (). The distributor pipe outlets are guided in a lateral manner along the rear face () of the tie () into the region between the two rails (&#x2032;) such that the outlets are located adjacent to each other and are laterally spaced from the rear face () of the tie ().

Method for producing ballast bodies

A process for the production of ballast for railway track laying, road construction, dam construction and bank protection, wherein ballast stones are spread out to form ballast and a reaction mixture for the preparation of a polyurethane foam, produced from components by a low-pressure process, is applied between the spread ballast stones.

Process for the production of ballast

The invention relates to a process for preparing dithiols derivatized with dithiocarbamic acids, in which the derivatized dithiols are obtained in high yield and purity.

Preparation of derivatized dithiols

The present invention relates to vulcanizable rubber mixes which, apart from the rubbers, contain O,O-bis-(alkyl)-dithiophosphoric acid polysulfides and primary and/or secondary amines, which are characterized in that they may be vulcanized without release of nitrosamines with a high crosslink density and a high proportion of short sulfur bridges.

Vulcanizable rubber mixes

The preparation of N-cyclohexylthiophthalimide from cyclohexylsulphenyl chloride and phthalimide can be reproduced more reliably if the cyclohexylsulphenyl chloride is prepared in sire by chlorinating dicyclohexyl disulphide.

Process for preparing N-cyclohexylthiophthalimide

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Odenthal, Germany

Thomas Kleiner