Patent ID: 6727213
Filing Date: 2004-04-27
Classification: C11D

Abstract:
A base composition, in the form of a tablet which becomes active substantially in a main wash cycle of a dishwasher, comprising:at least one separately arranged first region in or on the tablet, wherein the first region comprises at least one substance intended to become active substantially during a final rinse cycle of the dishwasher and at least one substance intended to prevent lime scale deposits in the dishwasher and on washed articles; wherein the first region further comprises an appropriate coating comprising at least one compound of which a solubility increases as a concentration of a basic ion in an ambient medium decreases; and the substances contained in the first region are not released, at least predominantly, until the start of the final rinse cycle at the earliest; wherein the first region comprises at least a first and a second part-region and wherein the substances in the first region are contained in the at least first and second part-regions, and further comprising a dividing layer between the first and second part-regions that is substantially impermeable to the substances.