Curing accelerator composition containing phosphorylated polycondensates

The present invention, by the reaction of water-soluble calcium compound with a water-soluble silicate compound, and by the reaction of calcium compound and silicon dioxide containing component in alkaline conditions, a process for the preparation of a hardening accelerator composition, both in case, the reaction is, at least one structural unit consisting of an aromatic or heteroaromatic moiety having polyether side chains, aromatic moiety having at least one phosphoric acid ester group and / or a salt or It is carried out in the presence of a polycondensate comprising at least one structural unit consisting of heteroaromatic moiety, a manufacturing method. The present invention provides a composition calcium silicate hydrate and polycondensates, and to the use for the permeability of the reduction of the composition used and cured as a curing accelerator.