Method for producing a detergent having improved optical and rheological properties

A sequential process introducing divalent cations into a liquid detergent composition achieves a cloudy white, ecologically friendly, and rheologically stable detergent suitable for water-soluble packaging, addressing the need for visually appealing and environmentally responsible liquid detergents.

EP4155374B1Active Publication Date: 2025-07-23HENKEL KGAA
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Patent Information

Application Number
EP2021198252
Authority / Receiving Office
EP · EP
Patent Type
Patents
Current Assignee / Owner
Filing Date
2021-09-22
Publication Date
2025-07-23
Estimated Expiration
2041-09-22

AI Technical Summary

Technical Problem

The challenge lies in producing ecologically acceptable white liquid detergents with improved optical and rheological properties suitable for packaging in water-soluble foil pouches, as traditional opacifiers are being phased out due to environmental concerns, and existing methods fail to achieve a homogeneous and visually appealing product efficiently.

Method used

A sequential process involving the preparation of a first liquid composition with surfactant, fatty acid, and solvent, followed by the introduction of divalent cations in the form of inorganic and organic salts, which are mixed to achieve a cloudy white appearance and stable viscosity, using a continuous or discontinuous method with specific mixing devices to ensure homogeneity and rheological stability.

Benefits of technology

The process results in a liquid detergent with a cloudy white appearance, high viscosity, and stable rheological properties, suitable for packaging in water-soluble pouches, enhancing consumer appeal and process efficiency while avoiding the use of harmful opacifiers.

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Abstract

A process for the production of a liquid, surfactant-containing detergent, comprising: i) 20 to 80 wt.% surfactant; ii) 2 to 15 wt.% fatty acid; iii) 0.3 to 8 wt.% salt of a divalent cation; iv) 8 to 35 wt.% solvent; comprising the steps of: a) providing a first liquid composition containing surfactant, fatty acid, and solvent; b) introducing a divalent cation into the liquid composition, wherein the divalent cation is introduced into the liquid composition in both the form of an inorganic salt and in the form of an organic salt, forming a salt-containing composition; c) mixing the salt-containing composition.
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Citation Information

Patent Citations

  • Pearlescent surfactant mixture

    EP0922754A1