C - Chemistry – Metallurgy – 11 – D
Patent
C - Chemistry, Metallurgy
11
D
C11D 17/00 (2006.01)
Patent
CA 2338711
The invention relates to a composition for use in a dishwasher which is provided in the form of a tablet. The inventive composition is characterized by a base composition which essentially carries out its function during the main cleaning cycle of the dishwasher, and is also characterized by at least one particle. Said particle has at least one core that comprises at least one substance which essentially carries out its function during the rinse cycle of the dishwasher. The particle also has a coating which, for the most part, completely surrounds the core(s). Said coating comprises at least one compound whose solubility increases with a declining concentration of a specific ion in the surrounding medium. The at least one particle is arranged in or on the tablet in such a way that the surface of the particle(s) is, at most, partially in direct contact with the surface of the base composition surrounding this/these particles. In order to prevent the coating from substantially dissolving or to prevent the coating from substantially detaching from the core(s), the concentration of the specific ion in the local surrounding of the particle(s) is sufficiently high until the tablet has, for the most part, completely dissolved. The invention also relates to a method for conducting a dishwashing cycle in a dishwasher while using the inventive composition.
L'invention concerne une composition se présentant sous la forme d'une pastille, pour utilisation dans un lave-vaisselle. Cette composition est caractérisée par une composition de base qui agit principalement lors du cycle de lavage principal du lave-vaisselle et par au moins une particule. Cette particule présente d'une part au moins un noyau comprenant au moins une substance qui agit principalement lors du cycle de rinçage du lave-vaisselle, et d'autre part un enrobage entourant pratiquement la totalité du ou des noyaux et comprenant au moins un composé dont la solubilité augmente lorsque la concentration d'un ion spécifique dans le milieu ambiant diminue. La ou les particules sont placées dans ou sur la pastille de sorte que la surface de la ou des particules soit tout au plus partiellement en contact direct avec la surface de la composition de base entourant la ou les particules. La concentration de l'ion spécifique dans le milieu ambiant de la ou des particules est suffisamment élevée jusqu'à la dissolution pratiquement totale de la pastille pour empêcher pratiquement une dissolution de l'enrobage ou une séparation de l'enrobage du ou des noyaux. L'invention concerne également un procédé pour effectuer un cycle de lavage d'un lave-vaisselle en utilisant la composition selon l'invention.
Carbonell Enric
Hertling Ludwig
Waschenbach Guido
Wiedemann Ralf
Wolf Natascha
Fetherstonhaugh & Co.
Reckitt Benckiser N.v.
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