Use of new bleach activators in dishwashing detergents
Use of a composition as a bleach activator in a dishwasher detergent composition, said composition being obtainable by reacting, at high temperatures in the presence of water, (i) a compound of formula 1 with; (ii) an alkali or ammonium salt of an alkyl sulphonate, paraffin sulphonate, aryl sulphonate, primary alcohol sulphate or fatty acid alkyl carboxylate or the respective acids or their substituted derivatives.
1 . Use of a composition as a bleach activator in a dishwasher detergent composition, said composition being obtained by reacting, at high temperatures in the presence of water,
(i) a compound of formula 1
wherein:
R 1 , R 2 , R 3 are the same or different and are linear or branched C 1 -C 24 -alkyl groups, C 2 -C 24 -alkenyl groups or C 1 -C 4 -alkoxy-C 1 -C 4 -alkyl groups, substituted or un-substituted benzyl(preferably unsubstituted), or R 1 and R 2 , in conjunction with the nitrogen atom to which they are bonded, form a ring having 4 to 6 C-atoms, which ring can contain in addition to the nitrogen atom and instead of carbon atoms, one or two oxygen or nitrogen atoms, which ring can be unsubstituted or substituted (preferably unsubstituted) with one or more C 1 -C 5 -alkyl, C 1 -C 5 -alkoxy, C 1 -C 5 -alkanoyl, phenyl, amino, ammonium, cyano, cyanamino, chlorine, bromine, a N—R 6 group or a R 3 —N—R 6 group, in which R 6 is hydrogen, C 1 -C 5 -alkyl, C 2 -C 5 -alkenyl, C 2 -C 5 -alkynyl, phenyl, C 7 -C 9 -aralkyl, C 5 -C 7 -cycloalkyl, C 1 -C 6 -alkanoyl, cyanomethyl or cyanide;
R 4 and R 5 are the same or different and are hydrogen, C 1 -C 4 -alkyl, C 1 -C 4 -alkenyl, C 1 -C 4 -alkoxy-C 1 -C 4 -alkyl, phenyl or C 1 -C 3 -alkylphenyl; and
X − is an anion; with
(ii) an alkali or ammonium salt of an alkyl sulphonate, paraffin sulphonate, aryl sulphonate, primary alcohol sulphate or fatty acid alkyl carboxylate or the respective acids or their substituted derivatives.
2 . Use according to claim 1 which at least one of R 4 and R 5 , which are the same or different, is hydrogen, methyl or phenyl.
3 . Use according to claim 1 or 2 wherein R 4 is hydrogen and R 5 is other than hydrogen.
4 . Use according to any one of the preceding claims in which X − is chloride, bromide, iodide, fluoride, sulphate, hydrogen sulphate, carbonate, hydrogen carbonate, phosphate, mono- or di-hydrogen phosphate, pyrophosphate, metaphosphate, nitrate, methyl sulphate, phosphonate, methyl phosphonate, methyl sulphonate or ethyl sulphonate.
5 . Use according to any one of the preceding claims wherein the ammonium nitrile of formula 1 and the alkali or ammonium salt or acid or derivative thereof are used in the manufacturing process in an equal molar ratio or with an excess of the alkali or ammonium salt or acid derivatives thereof.
6 . Use according to any one of the preceding claims wherein the alkali or ammonium salt of an aryl sulphonate or the respective acid or derivative has at least one side chain consisting of not more than 12 carbon atoms.
7 . Use according to any one of the preceding claims wherein a compound of formula 1, in which R 1 , R 2 and R 3 are methyl groups and R 4 and R 5 are hydrogen atoms, is reacted with an alkali or ammonium salt of cumene sulphonate.
8 . Use according to any one of the preceding claims wherein an excess of the alkali or ammonium salt is used in the manufacturing process.
9 . Use according to any one of the preceding claims wherein the composition in the form of a co-granulate which is coated with a coating substance.
10 . Use according to claim 9 wherein the coating substance is a polymer, wax, silicone or similar.
11 . Use according to any one of the preceding claims wherein the bleach activator is made by cover spraying an aqueous solution of the compound of formula 1 with an aqueous solution of the alkali or ammonium salt or acid or derivatives thereof, after which the resultant particles are dried.
12 . Use according to any one of the preceding claims wherein the dishwasher detergent composition is in the form of a dishwasher tablet.
13 . Use according to any one of the preceding claims wherein the dishwasher detergent composition is particulate.
14 . A method of cleaning crockery or cutlery using a detergent formulation comprising a bleach activator compound as defined in any one of the preceding claims, wherein, during the course of the method, the detergent formulation comes into contact with moisture or water at a point in time prior to dispensing the detergent formulation into the environment in which the cleaning process takes place.
15 . A method according to claim 14 which takes place in a domestic dishwashing machine, which the detergent formulation is placed in a dispenser compartment of the machine and comes into contact with moisture or water before the dispenser compartment opens and dispenses the formulation into the environment in which the cleaning process takes place.
16 . A dishwasher detergent composition comprising a bleach activator as defined in any one of the preceding claims 1 to 11 and a bleach.