Abstract: The residual halogen content in alkoxysilanes and in alkoxysilane-based compositions is reduced by a process comprising, treating the alkoxysilane or the alkoxysilane-based composition with activated carbon.

Abstract: A process for producing surface-sealed hollow glass containers, wherein as part of the production process the hollow glass containers are coated in the region of the exit from the annealing lehr, which is arranged following a machine for producing hollow glass containers, with a water-based cold end coating composition comprising a silane, where atop this first coat there is subsequently applied a second coat of a water-based cold end coating composition that comprises the following components:I. a water-based organopolysiloxane-containing composition prepared from alkoxysilanes which carry a functional group and alkoxysilanes which are selected from trialkoxysilanes, dialkoxysilanes and tetraalkoxysilanes, andII. a silicon-free component selected from a wax, a partial fatty acid ester, a fatty acid and/or a surfactant.The hollow glass containers produced in this way feature an enhanced long-term service strength.