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EP 4 680 691 A1

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(43) Date of publication: 21.01.2026 Bulletin 2026/04 (21) Application number: 24712182.5 (22) Date of filing: 13.03.2024

(51) International Patent Classification (IPC):  C09K 19/34(2006.01) C09K 19/04(2006.01) C09K 19/06(2006.01) C09K 19/12(2006.01) C09K 19/30(2006.01) (52) Cooperative Patent Classification (CPC): C09K 19/3444; C09K 19/3491; C09K 2019/3004; C09K 2019/301; C09K 2019/3027; C09K 19/3098; C09K 2019/3016; C09K 19/062; C09K 2019/122; C09K 2019/0448; C09K 2019/123 (86) International application number: PCT/EP2024/056602 (87) International publication number: WO 2024/189051 (19.09.2024 Gazette 2024/38)

(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: GE KH MA MD TN (30) Priority: 16.03.2023 CN 202310270665 (71) Applicant: Merck Patent GmbH 64293 Darmstadt (DE)	(72) Inventors: LAUT, Sven Christian 64293 Darmstadt (DE) LEE, Hee-Kyu Shanghai 201206 (CN) YANG, Minghui Shanghai 201206 (CN) WANG, Jing Shanghai 201206 (CN) (74) Representative: Merck Patent Association  Merck Patent GmbH 64271 Darmstadt 64271 Darmstadt (DE)