Patent · US Active

Two-part oxidative dyeing composition

US11737959B2 · kind B2 · utility

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0References

16Claims

0Family size

Assignee

KAO CORPORATION · JP

Inventors

Jens HEILMANN · Lübeck, DE
Diana Bauer · Darmstadt, DE
Steven Breakspear · Darmstadt, DE
Peter Bauer · Ludwigshafen, DE

Key dates

Filing date	Oct 30, 2020
Grant date	Aug 29, 2023
Priority date	—
Expiry date	Oct 30, 2040

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61K2800/596
WIPO fieldPharmaceuticals
WIPO sectorChemistry

Abstract

A two-part oxidative dyeing composition is described. The two-part composition has an alkaline first part comprising oxidative dye couplers and/or oxidative dye precursors, and a second part comprising hydrogen peroxide, xanthine and/or its derivatives, and a lipophilic compound. The second part is formulated as water-in-oil emulsion and it was unexpectedly found that xanthines stabilize the viscosity of the second part composition allowing for improved dyeing performance.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.