Patent ID: 6689732
Filing Date: 2004-02-10
Classification: C11D

Abstract:
A detergent composition comprising(a) from 1% to 70%, by weight of a hydrophilic anionic surfactant system, comprising: (i) at least 50% by weight of the system one or more alkyl mono-sulphate and/or mono-sulphonate surfactants; and (I) a dianionic surfactants of the formula â€ƒwhere R is an, optionally substituted, allyl, alkyl, alkenyl, aryl, akaryl, ether, ester, amine or amide group of chain length C1 to C28, or hydrogen; A and B are independently selected from alkylene, alkenylene, (poly)alkoxylene, hydroxyalkylene, arylalkylene or amido alkylene groups of chain length C1 to C28; whereby A, B, and R in total contain from 4 to about 31 carbon atoms; X and Y are anionic groups from the group comprising, carboxylate, sulfate and sulfonate, wherein at least one of X or Y is a sulfate group; z is 0 or 1; and M is a cationic counterion, said anionic surfactant system further optionally containing a member selected from the group consisting of; (ii) one or more additional anionic surfactants selected from the group consisting of: (II) an alkyl ester sulphonate surfactant of the formula R1â€”CH(SO3M)â€”(A)xâ€”C(O)â€”OR2 â€ƒwherein R1 is a C6-C22 hydrocarbyl, R2 is a C1-C6 alkyl, A is a C6-C22 alkylene, alkenylene, x is 0 or 1, and M is a cation; and (III) an alkyl alkoxylated sulphate of the formula R5O(A)mSO4M â€ƒwherein R5 is a C6-C24 alkyl or hydroxyalkyl group, A is an alkoxy unit, the average of m is at least 5, and M is a cationic counterion; and b) from 0.01% to 10.0%, by weight of the composition of a hydrophobic bleaching system comprising (i) a peroxylic acid of the formula R1â€”CO3M â€ƒwherein R1 has at least 6 carbon atoms, and M is a counterion; or (ii) a percarboxylic acid precursor of the formula R1â€”COâ€”L â€ƒwherein L is a leaving group which is linked to the R1â€”COâ€” group with an oxygen atom, and R1 has at least 6 carbon atoms; or mixtures of (i) and (ii); wherein said percarboxylic acid or said percarboxylic acid precursor is derived from a parent carboxylic acid having a critical micelle concentration of less than 0.5 moles/liter wherein said critical micelle concentration is measured in aqueous solution at a temperature of 20Â° C.-50Â° C. and with the proviso that dianionic surfactant of formula (I) wherein R has 18 or 20 C-atoms, is present at a level of 2% or 2.7% by weight of the composition, the weight ratio of said dianionic surfactant to the hydrophobic bleaching agent is not 1:1 or 1.35:1.