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EP 4 408 805 A1

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(43) Date of publication: 07.08.2024 Bulletin 2024/32 (21) Application number: 22793303.3 (22) Date of filing: 27.09.2022

(51) International Patent Classification (IPC):  C02F 3/04(2023.01) B01D 61/04(2006.01) C02F 3/20(2023.01) C02F 3/10(2023.01) C02F 3/06(2023.01) C02F 1/44(2023.01) (52) Cooperative Patent Classification (CPC): B01D 61/027; B01D 2311/04; B01D 2311/2688; B01D 2315/06; B01D 2317/04; C02F 1/441; C02F 1/442; C02F 3/06; C02F 3/104; C02F 3/201; C02F 2209/03; C02F 2209/18; C02F 2209/22; C02F 2209/42 (86) International application number: PCT/US2022/044810 (87) International publication number: WO 2023/055705 (06.04.2023 Gazette 2023/14)

(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: 28.09.2021 ES 202130908 (71) Applicants: DDP Specialty Electric Materials US, LLC. Wilmington, Delaware 19805 (US) Specialty Electronic Materials Netherlands BV 3313 LA Dordrecht (NL)

(72) Inventors: GILABERT ORIOL, Guillem 43006 Tarragona (ES) JONS, Stephen, D Edina, MN 55439 (US) SLAGT, J., Marcus 4530 Terneuzen (NL) (74) Representative: Abitz & Partner  Postfach 86 01 09 81628 München 81628 München (DE)