Patent No. EP3678634 (titled "Composition Containing A Quaternary Ammonium Compound, In Particular For The Preparation Of Care And Cleaning Formulations") was filed by Evonik Operations on Aug 14, 2018. The application was issued on Oct 4, 2023.
Microemulsion-based cosmetic formulation that enhances hair conditioning properties without surfactant thickening. The formulation comprises a microemulsion of cosmetic oil, non-ionic surfactant, and non-aqueous solvent, with water, that forms stable, phase-separated structures at room temperature. The microemulsion contains quaternary ammonium compounds, fatty alcohols, and polyols that combine to create a stable, non-foaming microemulsion. This formulation provides enhanced conditioning benefits through its unique microemulsion structure, which allows the cosmetic oil to penetrate hair shafts while maintaining a stable, non-foaming texture.

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