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EP 4 816 437 A1

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(43) Date of publication: 07.10.2026 Bulletin 2026/41 (21) Application number: 24827469.8 (22) Date of filing: 26.11.2024

(51) International Patent Classification (IPC):  C08G 18/42(2006.01) C08K 5/3445(2006.01) C08G 18/76(2006.01) C08K 5/00(2006.01) (52) Cooperative Patent Classification (CPC): C08K 5/0075; C08G 18/4238; C08G 18/7671   C-Sets: C08K 5/3445, C08L 75/06; (86) International application number: PCT/US2024/057387 (87) International publication number: WO 2025/117497 (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: 28.11.2023 WO PCT/CN2023/134796 (71) Applicant: Lubrizol Advanced Materials, Inc. Cleveland, OH 44141-3247 (US)	(72) Inventors: YAN, Xue-Song Shanghai 201611 (CN) ZHENG, Jun Shanghai 201611 (CN) LIU, Sheng-Liang Shanghai 201611 (CN) (74) Representative: Evans, Sophie Elizabeth et al Kilburn & Strode LLP Lacon London 84 Theobalds Road London WC1X 8NL London WC1X 8NL (GB)