(19)

(11)

EP 4 816 464 A1

(12)

(43) Date of publication: 07.10.2026 Bulletin 2026/41 (21) Application number: 24820846.4 (22) Date of filing: 28.11.2024

(51) International Patent Classification (IPC):  C08L 23/08(2025.01) B29D 22/00(2006.01) C08K 5/09(2006.01) (52) Cooperative Patent Classification (CPC): B29D 22/003   C-Sets: C08L 23/0815, C08L 23/0815, C08K 5/098; C08L 23/08, C08L 23/08, C08K 5/098; (86) International application number: PCT/IB2024/062007 (87) International publication number: WO 2025/114949 (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: 01.12.2023 US 202363605253 P (71) Applicant: Nova Chemicals (International) S.A. 1700 Fribourg (CH)	(72) Inventors: WASYLENKO, Derek Calgary, Alberta T2E 7K7 (CA) D'AGOSTINO, Carmine Calgary, Alberta T1Y 6G7 (CA) (74) Representative: Mewburn Ellis LLP  Aurora Building Counterslip Bristol BS1 6BX Bristol BS1 6BX (GB)