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EP 4 551 746 A1

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(43) Date of publication: 14.05.2025 Bulletin 2025/20 (21) Application number: 22952485.5 (22) Date of filing: 29.07.2022

(51) International Patent Classification (IPC):  D04H 1/00(2006.01) D04H 1/56(2006.01) D04H 1/43(2012.01) D04H 1/4291(2012.01) (52) Cooperative Patent Classification (CPC): D04H 1/56; D04H 1/4291; D04H 3/16; D04H 3/007; D04H 1/435; D04H 1/43838; D04H 5/00 (86) International application number: PCT/CN2022/109029 (87) International publication number: WO 2024/021038 (01.02.2024 Gazette 2024/05)

(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 (71) Applicant: Dow Global Technologies LLC Midland, MI 48674 (US)	(72) Inventors: YU, Haiyang Shanghai 201203 (CN) LI, Jingya Shanghai 201203 (CN) HUANG, Xin Shanghai 201203 (CN) (74) Representative: Boult Wade Tennant LLP  Salisbury Square House 8 Salisbury Square London EC4Y 8AP London EC4Y 8AP (GB)