Particle-shaped acetonitrile derivatives as bleach activators in solid detergents

Abstract

The invention aims to improve the oxidating and bleaching properties of inorganic peroxygen compounds during textile washing in a storage-resistant manner. In order to achieve this, particle-shaped compounds of formula (I) are essentially used, wherein R 1 represents H, CH 3 , a C 2-24 alkyl or alkenyl radical, a substituted C 2-24 alkyl or alkenyl radical comprising at least one substituent from the group Cl, Br, OH, NH 2 , CN, an alkyl or alkenylaryl radical comprising a C 2-24 alkyl group, or a substituted alkyl or alkenylaryl radical comprising a C 1-24 alkyl group and at least one further substituent on the aromatic ring; R 2 and R 3 are independently chosen from CH 2 —CN, CH 3 , CH 2 —H 3 , CH 2 —CH 2 —CH 3 , CH(CH 3 )—CH 3 , CH 2 —OH, CH 2 —CH 2 —OH, —CH(OH)—CH 3 , CH 2 —CH 2 —CH 2 OH, CH 2 —CH(OH)—CH 3 , CH(OH)—CH 2 —CH 3 , (CH 2 CH 2 —O) n H, n being equal to 1, 2, 3, 4, 5 or 6; R 4 and R 5 independently have one of the designations cited above for R 1 , R 2 or R 3 ; and X represents a charge equalising anion. Textile detergent contains approximately 0.1 wt. % to 10 wt. % of one such bleaching agent.

1 . The use of compounds of the general formula I, formulated to be particle-shaped using inorganic carrier materials which contain silicate,  
       
         
           
           
               
               
           
         
       
       in which R 1  is —H, —CH 3 , a C 2-24 -alkyl or -alkenyl radical, a substituted C 2-24 -alkyl or -alkenyl radical with at least one substituent from the group —Cl, —Br, —OH, —NH 2 , —CN, an alkyl- or alkenylaryl radical with a C 1-24 -alkyl group, or is a substituted alkyl- or alkenylaryl radical with a C 1-24 -alkyl group and at least one further substituent on the aromatic ring, R 2  and R 3 , independently of one another, are chosen from —CH 2 —CN, —CH 3 , —CH 2 —CH 3 , —CH 2 —CH 2 —CH 3 , —CH(CH 3 )—CH 3 , —CH 2 —OH, —CH 2 —CH 2 —OH, —CH(OH)—CH 3 , —CH 2 —CH 2 —CH 2 —OH, —CH 2 —CH(OH)—CH 3 , —CH(OH)—CH 2 —CH 3 , —(CH 2 CH 2 —O) N H where n=1, 2, 3, 4, 5 or 6, R 4  and R 5 , independently of one another, have a meaning given above for R 1 , R 2  or R 3 , and X is a charge-balancing anion, as activators for, in particular inorganic, peroxygen compounds in solid textile detergents which are used in essentially aqueous washing solutions.  
     
     
         2 . The use as claimed in  claim 1 , characterized in that the carrier material has an internal surface area in the range from 10 m 2 /g to 500 m 2 /g, in particular 100 m 2 /g to 450 m 2 /g.  
     
     
         3 . The use as claimed in  claim 1  or  2 , characterized in that the carrier material contains silicate from the group consisting of alkali metal silicates, silicas, silica gels and clays, and mixtures thereof.  
     
     
         4 . The use as claimed in any of  claims 1  to  3 , characterized in that in the particle-shaped formulation form, 10 to 50 parts by weight of the carrier material and 50 to 90 parts by weight of the compound according to formula I are present.  
     
     
         5 . The use as claimed in any of  claims 1  to  4 , characterized in that, in the compound according to formula I, R 1 , R 2  and R 3  are identical.  
     
     
         6 . The use as claimed in  claim 5 , characterized in that, in the compound according to formula I, R 1 , R 2  and R 3  are methyl groups.  
     
     
         7 . The use as claimed in any of  claims 1  to  6 , characterized in that the charge-balancing anion X −  is chosen from the halides, such as chloride, fluoride, iodide and bromide, nitrate, hydroxide, phosphate, hydrogen phosphate, dihydrogen phosphate, pyrophosphate, metaphosphate, hexafluorophosphate, carbonate, hydrogen carbonate, sulfate, hydrogen sulfate, C 1-20 -alkyl sulfate, C 1-20 -alkylsulfonate, optionally C 1-18 -alkyl-substituted arylsulfonate, chlorate, perchlorate and/or the anions of C 1-24 -carboxylic acids, such as formate, acetate, laurate, benzoate or citrate, alone or in any desired mixtures.  
     
     
         8 . The use as claimed in any of  claims 1  to  7 , characterized in that the charge-balancing anion X −  is chloride, sulfate, hydrogen sulfate, ethosulfate, lauryl sulfate, dodecylbenzenesulfonate, toluenesulfonate, cumenesulfonate, xylenesulfonate or methosulfate or mixtures thereof.  
     
     
         9 . The use according to one of  claims 1  to  8 , characterized in that the peroxygen compound to be activated is chosen from the group consisting of organic peracids, hydrogen peroxide, perborate and percarbonate, and mixtures thereof.  
     
     
         10 . The use as claimed in any of  claims 1  to  9 , characterized in that at the same time a bleach-enhancing active ingredient combination which is obtainable by intimately mixing a water-soluble salt of a divalent transition metal chosen from cobalt, iron, copper and ruthenium and mixtures thereof, a water-soluble ammonium salt and optionally an oxidizing agent based on peroxygen, and also inert carrier material is present.  
     
     
         11 . A solid detergent characterized in that it comprises 0.1% by weight to 10% by weight, in particular 0.2% by weight to 6% by weight, of a compound of the general formula I, formulated to be particle-shaped using inorganic carrier materials which contain, in particular, silicate  
       
         
           
           
               
               
           
         
       
       in which R 1  is —H, —CH 3 , a C 2-24 -alkyl or -alkenyl radical, a substituted C 2-24 -alkyl or -alkenyl radical with at least one substituent from the group —Cl, —Br, —OH, —NH 2 , —CN, an alkyl- or alkenylaryl radical with a C 1-24 -alkyl group, or is a substituted alkyl- or alkenylaryl radical with a C 1-24 -alkyl group and at least one further substituent on the aromatic ring, R 2  and R 3 , independently of one another, are chosen from —CH 2 —CN, —CH 3 , —CH 2 —CH 3 , —CH 2 —CH 2 —CH 3 , —CH(CH 3 )—CH 3 , —CH 2 —OH, —CH 2 —CH 2 —OH, —CH(OH)—CH 3 , —CH 2 —CH 2 —CH 2 —OH, —CH 2 —CH(OH)—CH 3 , —CH(OH)—CH 2 —CH 3 , —(CH 2 CH 2 —O) n H where n=1, 2, 3, 4, 5 or 6, R 4  and R 5 , independently of one another, have a meaning given above for R 1 , R 2  or R 3 , and X is a charge-balancing anion, in addition to customary ingredients compatible with the compound according to formula I.  
     
     
         12 . The composition as claimed in  claim 11 , characterized in that it comprises a peroxygen compound from the group consisting of organic peracids, hydrogen peroxide, perborate and percarbonate, and mixtures thereof.  
     
     
         13 . The composition as claimed in  claim 11  or  12 , characterized in that, in addition to the compounds according to formula I, 0.5% by weight to 7% by weight of compounds which release peroxocarboxylic acids under perhydrolysis conditions are present.  
     
     
         14 . The composition as claimed in any of  claims 11  to  13 , characterized in that, in addition to the compounds according to formula I, it comprises a bleach-enhancing active ingredient combination which is obtainable by intimately mixing a water-soluble salt of a divalent transition metal chosen from cobalt, iron, copper and ruthenium, and mixtures thereof, a water-soluble ammonium salt and optionally an oxidizing agent based on peroxygen, and an inert carrier material.  
     
     
         15 . The composition as claimed in any of  claims 11  to  13 , characterized in that, in addition to the compound according to formula I, bleach-catalyzing transition metal salts or complexes are present, in particular in amounts of from 0.0025% by weight to 0.5% by weight.  
     
     
         16 . The composition as claimed in any of  claims 11  to  15 , characterized in that it is in the form of tablet-shaped bodies.  
     
     
         17 . The composition as claimed in  claim 16 , characterized in that the tablet-shaped body has two layers.  
     
     
         18 . The composition as claimed in  claim 17 , characterized in that, in one layer, it has the bleaching agent in the form of the, in particular inorganic, peroxygen compound and, in the second layer, the bleach activator according to formula I formulated to be particle-shaped using inorganic carrier materials which contain, in particular, silicate.  
     
     
         19 . The composition as claimed in  claim 17 , characterized in that it has the bleaching agent in the form of the, in particular inorganic, peroxygen compound and the bleach activator according to formula I formulated to be particle-shaped using inorganic carrier materials which contain, in particular, silicate in the same layer, and further sensitive constituents, in particular enzymes, in a second layer.