Non-Oxidative Hair Dye Composition And Method
Patent No. EP4013376 (titled "Non-Oxidative Hair Dye Composition And Method") was filed by KAO on Aug 13, 2020. The application was issued on Dec 3, 2025.
Patent Summary
This non-oxidizing hair dye composition has a pH between 6 and 8.5 and comprises: a) one or more anionic, cationic, amphoteric/zwitterionic, and/or non-ionic surfactants or mixtures thereof; b) one or more linear or branched, saturated or unsaturated C12-C22 fatty alcohols or mixtures thereof; c) one or more anionic and/or non-ionic hair direct dyes or mixtures thereof; and d) one or more buffer systems. The buffer system must have a capacity from 0.002 g equiv/L to 0.5 g equiv/L at pH 6 to 8.5, measured via acid/base titration of the composition diluted 1:10 by volume with water at 25°C under atmospheric conditions. The composition is designed to enhance the uptake and deposition of anionic and/or non-ionic direct dyes into hair fibers.
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Date
Description
EP4013376
- Application Number
- EP20757863A
- Filing Date
- Aug 13, 2020
- Status
- Granted And Under Opposition
- Oct 31, 2025
- Publication Date
- Dec 3, 2025
- External Links
- Slate, Register , Google Patents