A method for the preparation of stable, the bifunctional, phosphate - and meta silicate free low alkalinity detergent tablets for the mechanical harness flushing

摘要

Disclosed is a method of producing phosphate-free and metasilicate-free low-alkali cleaning-agent tablets for machine dishwashing, the tablets consisting of solid alkali salts of at least one homopolymer or copolymer of (meth)acrylic acid, which may be in the form of granules, builders, low-foam surfactants, bleaching agents and, optionally, enzymes, bleach activators, fragrances and colourings. In this method, the sodium carbonate acting as one of the builders is used in anhydrous form. It indergoes mixing, either alone or together with the other builders and the solid alkali salt of (meth)acrylic acid, with the quantity of water necessary for partial hydration of the anhydrous carbonate, i.e. approximately 5 to 40 % by weight. The remaining components of the mixture are then added and the mixture compressed into tablet form.