Method for preparing a liquid washing or cleaning agent using a preservative-free dye solution

US11155771B2 · kind B2 · utility

Assignee

• Henkel AG & Co. KGaA · DE

Inventors

• Matthias Sunder · Goldkronach, DE
• Uwe Trebbe · Goldkronach, DE
• Stefan Hammelstein · Dressendorf, DE
• Volker Blank · Leverkusen, DE
• Thomas Holderbaum · Hilden, DE
• Alexander Tollkoetter · Hilden, DE
• Niklas Siepler · Goldkronach, DE
• Gerd Boesemann · Dressendorf, DE

Key dates

• Filing date: Nov 9, 2018
• Grant date: Oct 26, 2021
• Expiry date: Nov 9, 2038

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C11D11/0094
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A continuous method for preparing a liquid washing or cleaning agent which includes at least one surfactant and at least one dye. In this case, the dye solution used in the method according to the invention is free of preservatives. The present invention also relates to washing or cleaning agents which are obtained by way of the method according to the invention.