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AssigneeHenkel Kommanditgesellschaft auf Aktien
InventorsTheodor Altenschoepfer, Jochen Jacobs, Peter Jeschke, Klaus Schumann
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Detergents for dishwashing machines in the form of fused blocks containing alkali metal hydroxides, alkali metal silicates, and from 0.2 to 4% by weight of active chlorine donors having a hydrolysis constant of 3.times.10.sup.-4 or lower (preferably Na- or K-dichloroisocyanurate, Na-dichloroisocyanurate dihydrate, Na-monochloroamido-sulfonate or Na-N-chloro-p-toluene sulfonic acid amide). The process of making the fused blocks comprises heating metasilicate or waterglass solution with or without solid alkali metal hydroxide to 45.degree. to 48.degree. C., allowing the reaction temperature to rise to 60.degree. to 65.degree. C., adding the remaining ingredients including the active chlorine donor at 50.degree. to 65.degree. C., pouring the still liquid melt into flexible molds and allowing it to solidify into blocks therein. The detergent blocks of the invention have good stability to storage and a high dissolving rate in use.
Storage stable detergent composition for dishwashing machines in the form of homogeneous fused blocks comprising from about 2 to about 70% by weight of alkali metal hydroxide, from about 2 to about 60% by weight of alkali metal silicate, from about 10 to about 40% by weight of water, and from about 0.2 to about 4% by weight of an active chlorine donor having a hydrolysis constant of about 3.times.10.sup.-4 or below, all weights being based on the weight of said composition.
A storage stable detergent composition for dishwashing machines in the form of homogeneous fused blocks comprising on a weight basis of said composition:
A process for preparing homogeneous fused blocks of a storage-stable detergent composition comprised of, on a weight basis of said composition, from about 2 to about 70% by weight of sodium hydroxide, from about 2 to about 60% by weight of sodium silicate, from about 10 to about 40% by weight of water, from about 2 to about 50% by weight of pentasodium triphosphate, and from about 0.2 to about 4% by weight of an active chlorine donor having a hydrolysis constant of about 3.times.10.sup.-4 or below, which comprises heating said sodium silicate with said sodium hydroxide to a temperature between about 45 and about 65.degree. C., adding the remaining ingredients at a temperature of between about 50 and about 65.degree. C., and while the reaction mixture is fluid, pouring it into molds to cool and solidify.
Dependencies are inferred from the claim text.