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EP 4 581 061 A2

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(88) Date of publication A3: 10.05.2024 (43) Date of publication: 09.07.2025 Bulletin 2025/28 (21) Application number: 23861476.2 (22) Date of filing: 29.08.2023

(51) International Patent Classification (IPC):  C08B 17/02(2006.01) C08B 1/00(2006.01) C08B 3/06(2006.01) C08B 3/08(2006.01) (52) Cooperative Patent Classification (CPC): C08B 3/06; C08B 16/00; C08B 1/003 (86) International application number: PCT/US2023/073040 (87) International publication number: WO 2024/050329 (07.03.2024 Gazette 2024/10)

(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: KH MA MD TN (30) Priority: 31.08.2022 US 202263374091 P (71) Applicant: Eastman Chemical Company Kingsport, TN 37660 (US)

(72) Inventors: WAGNER, Glen Douglas Jonesborough, TN 37659 (US) TREASURE, Trevor Hobbs Kingsport, TN 37663 (US) ALLEN, John Michael Kingsport, TN 37660 (US) EDWARDS, Brian Tyndall Jonesborough, TN 37659 (US) MURDAUGH, Perry Michael Johnson City, TN 37601 (US) LIN, Robert Kingsport, TN 37664 (US) BOAZ, Neil Warren Kingsport, TN 37663 (US) URMAN, Kevin Leonard Gonzalez, FL 32560 (US) (74) Representative: Ricker, Mathias  Wallinger Ricker Schlotter Tostmann Patent- und Rechtsanwälte Partnerschaft mbB Zweibrückenstraße 5-7 80331 München 80331 München (DE)