Composition comprising a pre-formed peroxyacid and a bleach catalyst

Abstract

The present invention relates to a composition comprising: (i) a pre-formed peroxyacid or salt thereof in molecularly encapsulated form; and (ii) a bleach catalyst that is capable of accepting an oxygen atom from a peroxyacid and transferring the oxygen atom to an oxidizeable substrate.

Description

Claims

1. A composition comprising: (i) a pre-formed peroxyacid or salt thereof in molecularly encapsulated form; and(ii) a bleach catalyst that is capable of accepting an oxygen atom from a peroxyacid and transferring the oxygen atom to an oxidizeable substrate.

2. A composition according to claim 1, wherein the bleach catalyst comprises an iminium and/or a carbonyl functional group.

3. A composition according to claim 1, wherein the bleach catalyst comprises an oxaziridinium and/or a dioxirane functional group, and/or is capable of forming an oxaziridinium and/or a dioxirane functional group upon acceptance of an oxygen atom.

4. A composition according to claim 1, wherein the bleach catalyst has a chemical structure corresponding to the chemical formula:

5. A composition according to claim 1, wherein the bleach catalyst has a chemical structure corresponding to the chemical formula:

6. A composition according to claim 1, wherein the bleach catalyst has a chemical structure corresponding to the chemical formula:

7. A composition according to claim 1, wherein the pre-formed peroxyacid or salt thereof is the guest molecule in a host-guest complex.

8. A composition according to claim 7, wherein the host molecule is capable of forming intermolecular hydrogen bonds.

9. A composition according to claim 7, wherein the host-guest complex is a clathrate compound.

10. A composition according to claim 7, wherein the host molecule is urea and the host-guest complex is a clathrate compound.

11. A composition according claim 7, wherein the host-guest complex is at least partially coated by a coating ingredient.

12. A composition according to claim 11, wherein the coating ingredient is substantially incapable of forming hydrogen bonds.

13. A composition according to claim 11, wherein the coating ingredient is a paraffin wax.

14. A composition according to claim 11, wherein the host-guest complex is in an intimate mixture with a source of acid.

15. A composition according to claim 1, wherein the composition comprises a pre-formed peroxyacid in a sufficient amount so as to provide from above 0% to about 0.2%, by weight of the composition, of available oxygen.

16. A composition according to claim 1, wherein the composition comprises less than about 5%, by weight of the composition, of a source of peroxygen.

17. A composition according to claim 1, wherein the composition comprises from about 5% to about 10%, by weight of the composition, of a source of carbonate anion.

18. A composition according to claim 1, wherein the composition comprises a dye transfer inhibitor.

19. A composition according to claim 1, wherein the composition comprises: (i) less than about 5%, by weight of the composition, of zeolite builder;(ii) optionally, less than about 5%, by weight of the composition, of phosphate builder; and(iii) optionally, less than about 5%, by weight of the composition, of silicate salt.

20. A composition comprising: (i) a clathrate compound obtainable by contacting a preformed peroxyacid or salt thereof with urea; and(ii) a bleach catalyst that is capable of accepting an oxygen atom from a peroxyacid and transferring the oxygen atom onto a substrate to be bleached.