Use of Transition Metal Complexes as Bleach Catalysts in Washing and Cleaning Compositions
AssigneeClariant International Ltd.
InventorsGerd Reinhardt, Werner Janitschek, Miriam Ladwig
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Abstract
The invention relates to the use of manganese or iron complexes which, as well as a tetraoxolene unit, contain two macrocyclic, N-containing ligands, especially cyclen or cyclam ligands, in washing and cleaning compositions in the form of granules or powder or solution or suspension for bleaching of coloured stains both on textiles and on hard surfaces. The invention also relates to washing and cleaning compositions which comprise such complexes as bleach activators and to the use thereof for textile washing or for dishwashing detergents and other uses in personal care and other areas.
Claims20
A process for washing and cleaning a textile or a hard surface, comprising the step of contacting the textile or hard surface with a cleaning composition comprising at least one bleach catalyst, wherein the at least one bleach catalyst comprises at least one transition metal complex, wherein the transition metal complex comprises a tetraoxolene unit, and at least two macrocyclic, N-containing ligands, wherein the transition metal complex is according to the chemical formula (I)
- [(L)M(Y)M(L)]Xm (I)
- where
- M is a metal atom selected from the group consisting of Mn and Fe,
- L is a ligand of the formula (II) or (III)
- in which
- R is a hydrogen or an alkyl having 1 to 8 carbon atoms,
- R1, R2, R3 and R4 are identical or different and are a hydrogen, an alkyl having 1 to 8 carbon atoms, a nitrogen-bridging alkylene unit having 2 to 4 carbon atoms or an alkaryl having 6 to 16 carbon atoms,
- n is an integer from 0 to 6,
- Y is a group of the formula (IV)
- in which
- R5 are identical or different and are a hydrogen, an alkyl having 1 to 4 carbon atoms, Cl or Br,
- X is a neutral or anion ligand selected from the group consisting of CH3CN, chloride, bromide, nitrate, perchlorate, sulfate, citrate, hexafluorophosphate, trifluoromethanesulfonate, tetrafluoroborate, tetraphenylborate, or -anions of organic acids with C1-C22 carbon atoms, and H2O, and
- m is a number from 0 to 4.
A washing or cleaning composition for the washing of textiles or for hard surfaces, and for solutions for bleaching colored soilings, comprising at least one bleach catalyst, wherein the at least one bleach catalyst comprises at least one transition metal complex, wherein the transition metal complex comprises a tetraoxolene unit, and at least two macrocyclic, N-containing ligands, wherein the transition metal complex is according to the chemical formula (I)
- [(L)M(Y)M(L)]Xm (I)
- where
- M is a metal atom selected from the group consisting of Mn and Fe,
- L is a ligand of the formula (II) or (III)
- in which
- R is a hydrogen or an alkyl having 1 to 8 carbon atoms,
- R1, R2, R3 and R4 are identical or different and are a hydrogen, an alkyl having 1 to 8 carbon atoms, a nitrogen-bridging alkylene unit having 2 to 4 carbon atoms or an alkaryl having 6 to 16 carbon atoms,
- n is an integer from 0 to 6,
- Y is a group of the formula (IV)
- in which
- R5 are identical or different and are a hydrogen, an alkyl having 1 to 4 carbon atoms, Cl or Br,
- X is a neutral or anion ligand selected from the group consisting of CH3CN, chloride, bromide, nitrate, perchlorate, sulfate, citrate, hexafluorophosphate, trifluoromethanesulfonate, tetrafluoroborate, tetraphenylborate, and anions of organic acids with C1-C22 carbon atoms, and H2O, and
- m is a number from 0 to 4.
Dependencies are inferred from the claim text.