Patent ID: 6806244
Filing Date: 2004-10-19
Classification: C02F,C11D

Abstract:
A composition for use in a water tank, comprising a tablet composition comprising an ionic compound which deploys its function following a first addition of water to the tank, a particle having a core, the core comprising a substance intended to perform its function after a complete or partial emptying of the first addition water from the tank and inflow of fresh water into the tank, and a covering surrounding the core, the covering comprising a compound whose solubility is inversely proportional to a concentration of the ionic compound in a surrounding medium, wherein the particle is arranged in or on the tablet such that only a portion of a surface of the particle directly contacts the tablet, wherein the concentration of the ionic compound caused by dissolution of the tablet is, until the inflow of fresh water into the tank, sufficiently high to prevent dissolution of the covering or detachment of the covering from the core.