Colorant for cement-containing construction materials and process for the production thereof

摘要

The invention relates to a colorant for cement-containing construction materials which comprises resins, preferably hydrocarbon resins and/or cumarone-indene resins, which absorb light radiation or UV radiation and are used finely ground alone or in an aqueous slurry or as emulsion and/or in dissolved form for colouring cement-containing elements or cement suspensions. The resin formulations can also be ground with carbon black of any particle size. The construction elements coloured therewith do not, as was previously the case, lose their black colour even under intensive and long-acting solar radiation.