Toilet cleansing block containing greater than 3% of a binder selected from cellulose binder or gum

摘要

his toilet water reservoir-cleansing block comprises: a).3-10% by weight of a linear primary alcohol of between 9 and 20 carbons; b).30-65% by weight of anionic surfactant and c).greater than 3% by weight of binder being either cellulose binder or gum. The weight ratio of the alcohol to the surfactant is between 1:3 and 1:20. The block is formulated and configured such that the time for the block to completely dissolve in the "In-the-tank Test" described in the specification in water of zero hardness as expressed in the terms of calcium carbonate would be at least 90% of the time for the block to essentially completely dissolve in the "In-the-tank Test" in water containing between 115-110 PPM of calcium carbonate. The block should not completely dissolve in either test prior to 150 flushes.