Process for the preparation of polymer-based absorption material with the addition of water-soluble substances and use of this absorption material for the absorption and / or subsequent release of water or aqueous solutions

摘要

The invention relates to a process for the production of absorbers for water, aqueous solutions and body liquids, the absorbers consisting of at least two components A and B, whereby component A is at least a water-swellable synthetic polymer or copolymer, and component B is at least a natural or synthetic compound being present at normal temperature as a pourable powder which is highly or at least partially soluble, in water, or as a liquid. The present invention is characterized by the fact that component B is added in the form of a powder, a liquid or as a solution to component A during the end phase of the production process thereof after a polymer reaction degree of 90%, preferably 95% is attained, that is is mixed with the polymer gel of component A and, in order to obtain a powdery, pourable end product, is dried, if necessary, and ground. The invention further relates to the use of said absorbers for the absorption and/or retention of water and/or aqueous solutions and for the subsequent controlled release of water and the substances contained in the swollen polymer gel and soluble in the aqueous medium (component B) to other bodies, preferably to plants, as nutrients for various cultures, and in the controlled dosage of nutrients and drugs.