(19)
(11) EP 4 577 178 A1

(12)

(43) Date of publication:
02.07.2025 Bulletin 2025/27

(21) Application number: 23758322.4

(22) Date of filing: 21.08.2023
(51) International Patent Classification (IPC): 
A61K 8/31(2006.01)
A61Q 5/10(2006.01)
A61Q 5/06(2006.01)
 A61K 8/73(2006.01)
A61Q 5/00(2006.01)
(52) Cooperative Patent Classification (CPC):
A61K 8/31; A61K 8/732; A61Q 5/10; A61Q 5/004; A61Q 5/065
(86) International application number:
PCT/EP2023/072911
(87) International publication number:
WO 2024/042025 (29.02.2024 Gazette 2024/09)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA
Designated Validation States:
KH MA MD TN

(30) Priority: 22.08.2022 EP 22191514

(71) Applicant: DSM IP Assets B.V.
6221 BE Maastricht (NL)

(72) Inventors:
  • HAAG, Désirée Sarah
    4303 Kaiseraugst (CH)
  • MENDROK-EDINGER, Christine
    4303 Kaiseraugst (CH)

(74) Representative: dsm-firmenich IP 
DSM-Firmenich AG Wurmisweg 576
4303 Kaiseraugst
4303 Kaiseraugst (CH)

   


(54) HAIR DYES LEADING TO AN INCREASE OF THE COLOUR RESISTANCE OF DYED HAIR