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(11)

EP 4 551 760 A1

(12)

(43) Date of publication: 14.05.2025 Bulletin 2025/20 (21) Application number: 23738729.5 (22) Date of filing: 05.07.2023

(51) International Patent Classification (IPC):  D21H 25/00(2006.01) D21H 27/02(2006.01) B31F 1/07(2006.01) (52) Cooperative Patent Classification (CPC): D21H 25/005; D21H 27/02 (86) International application number: PCT/EP2023/068546 (87) International publication number: WO 2024/008794 (11.01.2024 Gazette 2024/02)

(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: 06.07.2022 EP 22183300 30.08.2022 EP 22192932 (71) Applicant: Omya International AG 4665 Oftringen (CH)	(72) Inventors: MELO RODRIGUEZ, Gabriela 5000 Aarau (CH) SCHOELKOPF, Joachim 5727 Oberkulm (CH) GULLO, Rosario Maurizio 5706 Boniswil (CH) (74) Representative: Maiwald GmbH  Elisenhof Elisenstraße 3 80335 München 80335 München (DE)