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1. WO1997024430 - PEROXYGEN BLEACH COMPOSITION ACTIVATED BY OXO-PIPERIDINIUM SALTS

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[ EN ]

What is claimed is:

1. A peroxygen bleaching composition which comprises by weight a mixture of:
(A) about 1 to about 75% of a peroxygen bleaching compound; and
(B) about 1 to about 75% of a peroxygen bleaching compound activator having the formula:



wherein the carbonyl function, >C=O, can be located at either the 3 or 4 position of the oxopiperidinium ring, Rj and R2 are each an alkyl group having 1 to about 18 carbon atoms. X is R1SO4" Br~ or Cl", and the other oxopiperidinium ring atoms can be mono- or disubstituted by one or more substitutents selected from the group consisting of R^ and R2 groups, aryl groups having 6 to about to 10 carbon atoms, and alkaryl groups having about 7 to about 20 carbon atoms.

2. The composition claimed in claim 1 wherein said peroxygen bleaching compound is an inorganic peroxygen bleaching compound.

3. The composition claimed in claim 2 wherein said inorganic peroxygen bleaching compound is potassium monoperoxysulfate.

4. The composition claimed in claim 1 wherein said peroxygen bleaching compound activator is an oxopiperidinium salt.

5. The composition claimed in claim 4 wherein the oxopiperidinium salt is a 1 ,1-dialkyl- 4-oxopiperidinium methosuifate.

6. The composition claimed in claim 1 wherein each of said peroxygen bleaching compound and said peroxygen bleaching compound activator is present in an amount of about 5 to about 60% by weight.

7. The composition claimed in claim 1 wherein each of said peroxygen bleaching compound and said bleaching compound activator is present in an amount of about 5 to about 50% by weight.

8. The composition claimed in claim 1 wherein said mixture is dissolved in water at concentration of about 0.05 to about 10 grams of said mixture per liter of water.

9. The composition claimed in claim 2 further including at least one non-aqueous liquid carrier and the mixture of said inorganic peroxygen bleaching compound activator is present at a concentration of about 0.05 to about 10% by weight.

10. The composition claimed in claim 1 further including at least one member selected from the class consisting of: anti-foam agents, thickening agents, surfactants, fabric softening agents, anti-static agents, stabilizing agents, buffering agents, inorganic builder salts, suspending and anti-depositing agents, alkali metal silicates, enzymes, anti-corrosion agents, preservatives, dyestuffs and pigments.

1 1. The composition claimed in claim 1 further including an aqueous carrier.

12. A bleaching composition comprising water and about 10 to about 1,000 ppm of a composition according to claim 1.

13. The bleaching solution claimed in claim 12 including at least one member selected from the class consisting of:
anti-foam agents, thickening agents, surfactants, fabric softening agents, anti-static agents, stabilizing agents, buffering agents, inorganic builder salts, suspending and anti-depositing agents, alkali metal silicates, enzymes, anti-corrosion agents, preservatives, dyestuffs and pigments.

14. A method for cleaning soiled fabrics by bleaching which comprises adding to an aqueous wash liquor the composition claimed in claim 1 in an amount sufficient to clean said soiled fabrics.

15. A method for removing stains on hard surfaces which comprises contacting said hard surfaces with an effective bleaching amount of a composition according to claim 1.

16. A method according to claim 15 wherein said composition is present in an aqueous medium.

17. A method for inhibiting dye transfer from taking place from the aqueous medium in which soiled fabrics are cleaned by bleaching of the fabrics which comprises adding to the aqueous washing medium an amount of the composition of claim 1 sufficient to inhibit dye transfer.

18. A method for activating a peroxygen bleach compound present in aqueous solution which comprises adding an effective amount of an activator having the formula:



wherein the carbonyl function, >C=O, can be located at either the 3 or 4 position of the oxopiperidinium ring, R1 and R2 are each an alkyl group having 1 to about 18 carbon atoms, X is R1 SO4", Br" or Cl", and the other oxopiperidinium carbon ring atoms can be mono- or disubstituted by one or more substitutents selected from the group consisting of R\ and R2 groups, aryl groups having 6 to about to 10 carbon atoms, and alkaryl groups having about 7 to about 20 carbon atoms.

19. A method according to claim 18 wherein said peroxygen bleaching compound is a monopersulfate salt.

20. A method according to claim 19 wherein the monopersulfate is potassium monopersulfate.

21. A method according to claim 19 wherein the activator is a 1 , 1 -dialkyl-4-oxopiperidinium salt.

22. A method according to claim 21 wherein the 1 ,1 -dialkyl-4-oxopiperidinium salt is 1,1-dimethyl-4-oxopiperidinium methosuifate.

23. The composition claimed in claim 5 wherein the l,l-dialkyl-4-oxopiperidinium salt is 1 , 1 -dimethyl-4-oxopiperidinium methosuifate.