Bleach granules
The invention relates to co-granules containing a) at least one bleach activator, b) at least one metal-containing bleach catalyst, and c) at least 5 wt. % of at least one organic acid. The co-granules are easy to produce, have a high stability in storage and are advantageously suitable for producing cleaning products and detergents and especially products for cleaning crockery in a machine.
1. A cogranule comprising, based on the total weight of the cogranule,
a) 50 to 85% by weight of a bleach activator,
b) 0.1 to 20% by weight of at least one metal-containing bleach catalyst, wherein the at least one metal-containing bleach catalyst is selected from the group consisting of manganese salts and manganese complexes,
c) 8 to 20% by weight of at least one organic acid selected from the group consisting of citric acid, ascorbic acid and oxalic acid and
d) 1 to 20% by weight of at least one binder which is not the at least one organic acid as per component c),
with the further requirement that the bleach activator in the cogranule consists of either (i) tetraacetylethylenediamine only or (ii) decanoyloxybenzoic acid only.
2. A cogranule as claimed in claim 1 , wherein the at least one binder is selected from the group consisting of fatty acids, alcohol ethoxylates and polymers.
3. A process for producing a washing and cleaning composition comprising the step of adding a cogranule as claimed in claim 1 to the washing and cleaning composition.
4. A process for producing a composition for the machine washing of dishware comprising the step of adding a cogranule as claimed in claim 1 to the composition for the machine washing of dishware.
5. A cogranule as claimed in claim 1 , wherein the metal containing bleach catalyst is selected from manganese sulfate, manganese acetate and manganese oxalate.
6. A cogranule as claimed in claim 5 , wherein the at least one binder is selected from the group consisting of fatty acids, alcohol ethoxylates and polymers.
7. A cogranule as claimed in claim 1 , wherein the cogranule absorbs moisture in an amount of about 1% by weight to 5.1% by weight of at least 1%.
8. A cogranule as claimed in claim 1 , wherein the bleach catalyst is selected from the group consisting of: manganese sulfate; manganese acetate; manganese oxalate; [Mn III 2(μ-O) 1 (μ-OAc) 2 (TACN) 2 ](PF 6 ) 2 ; [Mn IV 2 (μ-O) 3 (Me-TACN) 2 ](PF 6 ) 2 ; [Mn IV 2 (μ-O) 3 (Me-TACN) 2 ](SO 4 ); [Mn IV 2 (μ-O) 3 (Me-TACN) 2 ](OAc) 2 ; [Mn IV 2 (μ-O) 3 (Me-TACN) 2 ](Cl) 2 ; [Mn IV 2 (μ—O) 3 (Me4-DTE)](PF 6 ) 2 ; [Mn IV 2 (μ-O) 3 (Me4-DTE)]Cl 2 ; [Mn IV 2 (μ-O) 3 (Me4-DTE)](SO 4 ); [Mn IV 2 (μ-O) 3 (Me4-DTE)](OAc) 2 ; 1,8-diethyl-1,4,8,11-tetraazacyclotetradecanemanganese(II) chloride and 1,4,8,11-tetraazacyclotetradecanemanganese(II) chloride.
9. A cogranule as claimed in claim 8 , wherein the bleach catalyst is selected from the group consisting of: manganese acetate; manganese oxalate and
[Mn IV 2 (μ-O) 3 (Me-TACN) 2 ](PF 6 ) 2 .