Abstract: It has been found that a hot-melt adhesive composition can be prepared by mixing a starch product, urea and optionally water are mixed with each other to obtain a homogeneous composition, the starch product/urea weight ratio being selected within the range of 3/1-3/97 and the amount of water present being 3-20 wt. %, based on the amount of starch product +urea, and which mixing may or may not be carried out with heating, but an oxidative treatment is omitted. Moreover, a hot-melt adhesive composition has been found which essentially comprises the above components in the above weight ratio and amount. The composition obtained according to the invention is solid at room temperature but becomes fluid at elevated temperature and can particularly be used in the manufacture of packagings and nonwoven articles.

Abstract: Dry products in flake or granulate form suitable as a paste base may be obtained by drying a mixture, containing approximately 30 to 80% by weight of water, of from(a) 30 to 95% by weight of carboxymethylated and/or alkoxylated starch,(b) 3 to 40% by weight of a cellulose ether, and(c) 2 to 40% by weight of a water-dispersible polymer or water-soluble polymer, and(d) optionally, conventional additives, such as preservatives, wetting agents, fillers and the like,in a thin layer on a surface heated to 80.degree. to 200.degree. C. The dry products obtained do not undergo physical separation and are readily dispersible or self-dispersible in water.

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.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 disrupting or puncturing the microcapsules.