Patent ID: 8426350
Filing Date: 2013-04-23
Classification: C11D

Abstract:
1. A detergent composition comprising three or more distinct regions, the composition comprising one or more anti-corrosion agents selected from benzotriazole or bis-benzotriazole and substituted derivatives thereof and/or metal salts or complexes chosen from the group consisting of zinc, cobalt and bismuth salts and/or complexes and a bleaching compound, wherein, a) at least 60% wt of the total amount of the bleaching compound in the detergent composition is located in a first distinct region, which region is substantially free of anti-corrosion agents; b) at least 95% wt of the total amount of one or more anti-corrosion agents in the detergent composition are located in a second distinct region having a pH, measured as a 1% wt solution, in the range of from 5 to 8.9 which second distinct region is not in direct contact with the first distinct region, wherein the second distinct region further comprises from 1% wt to 10% wt of the total amount of the bleaching compound in the detergent composition, and further wherein the second distinct region has a lower pH than the first distinct region; and c) at least one further distinct region located between the first and second distinct regions comprises less than 5% wt of the total amount of anti-corrosion agents in the composition.