Abstract: A cellulose ether that is predominantly substituted in the C3 position of the anhydroglucose unit of the cellulose is described. In an embodiment of the present invention, the partial degree of substitution in the C3 position of the cellulose ether is ≧60%, based on the total degree of substitution. Also described is a process for preparing the cellulose ether of the present invention. The process involves, reacting cellulose, dissolved in N-methylmorpholine-N-oxide monohydrate (NMMNO) and optionally other inert organic solvents, with alkylation reagents. The reaction takes place in the presence of: (i) an insoluble solid phase catalyst, e.g., solid ion exchange resins based on polystyrene having quaternary ammonium groups; (ii) stabilizers, e.g., propyl gallate; and (iii) optionally additional soluble co-catalysts, e.g., trimethylbenzylammonium hydroxide.

Abstract: A carriage body of a railroad car has an undercarriage, a floor slab, side wall parts, and a roof, the floor slab having a width which together with a thickness of the side wall parts which face one another defining a functional size of a width of the carriage body, the undercarriage having a width which is less than the functional size of the width of the carriage body, the side wall parts being connected in a force-transmitting fashion to the undercarriage.