| abstract |
This invention relates to a process for applying waterproof starch layers to substrates, which comprises applying an aqueous starch dispersion containing a waterproofing agent to the substrate and then drying same. n In order to improve the processability and processing time of the binders, this invention is characterized in that the waterproofing agent or a catalyst which catalyzes the reaction of the waterproofing agent with the starch molecules is present in the starch dispersion in the form of microcapsules, and that, after applying the starch dispersion to the substrate, the waterproofing agent is reacted with the starch molecules by digesting the microcapsules. |