Patent ID: 6653271
Filing Date: 2003-11-25
Classification: C11D,D06L

Abstract:
A bleaching composition comprising 1 to 40% of surfactant and a free ligand for bleaching a substrate with atmospheric oxygen, the free ligand being a pentadentate or hexadentate ligand of general formula (VE):R1R1Nâ€”Wâ€”NR1R2 â€ƒâ€ƒ(VE) whereineach R1 independently represents â€”R3â€”V, in which R3 is selected from the group consisting of an optionally substituted: alkylene; alkenylene; oxyalkylene; aminoalkylene; and, alkylene ether, V represents an optionally substituted pyridinyl group; W represents an optionally substituted â€”CH2CH2â€” group; and R2 represents a group selected from: R1; alkyl; aryl; and, arylalkyl, the R2 groups being optionally substituted with a substituent selected from: hydroxy; alkoxy; phenoxy; carboxylate; carboxamide; carboxylic ester; sulphonate; amine; alkylamine; and, N+(R4)3, wherein R4 is selected from the group consisting of: hydrogen; alkanyl; alkenyl; arylalkanyl; arylalkenyl; oxyalkanyl; oxyalkenyl; aminoalkanyl; aminoalkenyl; alkanyl ether; and, alkenyl ether,the ligand present in an effective amount for bleaching the substrate, wherein the composition is substantially devoid of a bleaching group selected from the group consisting of: peroxygen bleach; a peroxy-based; and, a peroxy-generating bleach system.