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(11)

EP 4 384 657 A1

(12)

(43) Date of publication: 19.06.2024 Bulletin 2024/25 (21) Application number: 22760941.9 (22) Date of filing: 03.08.2022

(51) International Patent Classification (IPC):  C25C 5/02(2006.01) C25C 1/20(2006.01) C25C 1/12(2006.01) C25C 7/08(2006.01) (52) Cooperative Patent Classification (CPC): C25C 1/12; C25C 1/20; C25C 5/02; C25C 7/08 (86) International application number: PCT/EP2022/071854 (87) International publication number: WO 2023/016896 (16.02.2023 Gazette 2023/07)

(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 MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 13.08.2021 WO PCT/CN2021/112443 (71) Applicant: BASF SE 67056 Ludwigshafen am Rhein (DE)	(72) Inventors: ZHU, Si Jun Shanghai, Shanghai 200137 (CN) SONG, Jin Bo Shanghai, Shanghai 200137 (CN) XIA, Jing Cheng Shanghai, Shanghai 200137 (CN) (74) Representative: Maiwald GmbH  Elisenhof Elisenstraße 3 80335 München 80335 München (DE)