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EP 4 816 421 A1

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(43) Date of publication: 07.10.2026 Bulletin 2026/41 (21) Application number: 24827377.3 (22) Date of filing: 22.11.2024

(51) International Patent Classification (IPC):  C08F 110/02(2006.01) C08F 4/80(2006.01) C08F 220/18(2006.01) (52) Cooperative Patent Classification (CPC): C08F 10/02   C-Sets: C08F 10/02, C08F 4/80; C08F 110/02, C08F 2500/02, C08F 2500/34; C08F 210/02, C08F 220/1804, C08F 2500/02, C08F 2500/03, C08F 2500/27, C08F 2500/34; C08F 110/02, C08F 2500/02, C08F 2500/03, C08F 2500/34; (86) International application number: PCT/US2024/057102 (87) International publication number: WO 2025/117378 (05.06.2025 Gazette 2025/23)

(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: 30.11.2023 US 202363604617 P (71) Applicants: Dow Global Technologies LLC Midland, MI 48674 (US) CALIFORNIA INSTITUTE OF TECHNOLOGY Pasadena, California 91125 (US)

(72) Inventors: AGAPIE, Theodor Pasadena, California 91125 (US) XIONG, Shuoyan Pasadena, California 91125 (US) GHANA, Priyabrata Pasadena, California 91125 (US) TEKPOR, Adjeoda Pasadena, California 91125 (US) SPINNEY, Heather A. Midland, Michigan 48667 (US) KLOSIN, Jerzy Midland, Michigan 48674 (US) NETT, Alex J. Midland, Michigan 48674 (US) (74) Representative: Boult Wade Tennant LLP  Salisbury Square House 8 Salisbury Square London EC4Y 8AP London EC4Y 8AP (GB)