Washing or cleaning agents with electrochemically activatable anionic mediator compounds

Patent metadata

Field	Value
Publication number	US-10160934-B2
Application number	US-201615332018-A
Country	US
Kind code	B2
Filing date	Oct 24, 2016
Priority date	Apr 24, 2014
Publication date	Dec 25, 2018
Grant date	Dec 25, 2018

Abstract

The aim of the invention is to improve the cleaning power of washing and cleaning agents, especially with regard to bleachable stains, while avoiding any damage to the textile treated with said washing and cleaning agents. This is substantially achieved by using an electrolytically bleachable species generated by a redox reaction from an anionically substituted 1-hydroxy-2,2,6,6-tetramethylpiperidine, 2,2,6,6-tetramethylpiperidine-N-oxide, or (2,2,6,6-tetramethylpiperidine-1-yl)oxyl.

First claim

What is claimed is:

1. A method for washing textiles or for cleaning hard surfaces, wherein the textiles or hard surfaces are contacted with a bleaching-active species, generated electrolytically by a redox reaction in an electrolysis device from anionically substituted 1-hydroxy-2,2,6,6-tetramethylpiperidine, 2,2,6,6-tetra-methylpiperidine-N-oxide, or (2,2,6,6-tetramethylpiperidin-1-yl)oxyl, wherein the anionic substitutent comprises an ester or amide at position 4 of the piperidine ring, in an aqueous bath.

2. The method according to claim 1 , characterized in that the bath containing the mediator compound is electrolyzed continuously or once or repeatedly for specific time periods.

3. The method according to claim 1 , characterized in that the electrolysis device is formed as a separate device independent of a washing machine or dishwasher, and said device operates on its own power source.

4. The method according to claim 1 , characterized in that the mediator compound passes through an electrolysis device before admission into the chamber of a washing machine and flows in aqueous solution or as a slurry through an electrolysis cell.

5. The method according claim 1 , wherein the concentration of the mediator compound in the aqueous washing or cleaning bath is 0.05 mmol/L to 5 mmol/L.

Assignees

• Henkel Ag & Co Kgaa

Inventors

• Spill Iwona
• Job Mareile
• Schmiedel Peter
• Gerke Thomas
• Grundmeier Guido
• Voigt Markus

Classifications

• C11D9/446

  Bleaching agents · CPC title

• C11D7/3281

  Heterocyclic compounds · CPC title

• C11D3/28 Primary

  Heterocyclic compounds containing nitrogen in the ring · CPC title

• C11D11/0023

  Chemistry & Metallurgy · mapped topic

• C11D3/349

  additionally containing nitrogen atoms, e.g. nitro, nitroso, amino, imino, nitrilo, nitrile groups containing compounds or their derivatives or thio urea · CPC title