| abstract |
The invention relates to a delayed action powdery building compound, consisting of a reactive support material and a liquid polymer component applied to said support material. The inventive compound can contain the support material in the form of hydraulic (latent) binder, inorganic additives and/or organic components, and the polymer component, for example in the form of polyvinyl alcohols, polyvinyl acetates and AMPS-based polymers. Said compound makes it possible to obtain the delayed liberation of the support material in an aqueous building chemical mixture as a result of a time-dependent separation of the polymer component from said support material. Said powdery building compound also makes it possible to carry out a time-controlled hardening of hydratable building material mixtures and to obtain a time-controlled internal drying of aqueous dispersion-based materials. |