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EP 4 798 563 A1

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(43) Date of publication: 02.09.2026 Bulletin 2026/36 (21) Application number: 24882535.8 (22) Date of filing: 24.10.2024

(51) International Patent Classification (IPC):  C07C 43/23(2006.01) G02B 1/04(2006.01) C08G 64/06(2006.01) (52) Cooperative Patent Classification (CPC): C08G 64/06; C08G 64/1608; C08G 64/305; C08G 64/307; G02B 1/041; C09B 69/10; C09B 69/109; C09B 69/103   C-Sets: G02B 1/041, C08L 69/00; (86) International application number: PCT/JP2024/080182 (87) International publication number: WO 2025/089429 (01.05.2025 Gazette 2025/18)

(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: 25.10.2023 JP 2023183198 (71) Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC. Chiyoda-ku Tokyo 100-8324 (JP)

(72) Inventors: KATO, Noriyuki Tokyo 1008324 (JP) NISHIMORI, Katsushi Tokyo 1258601 (JP) MOTEGI, Atsushi Tokyo 1258601 (JP) ISHIHARA, Kentaro Tokyo 1008324 (JP) WATANABE, Takafumi Tokyo 1258601 (JP) TAKAMATSU, Kazutaka Tokyo 1258601 (JP) YAMASHITA, Kaito Tokyo 1258601 (JP) HARADA, Yutaro Tokyo 1258601 (JP) REUTER, Karl 79108 Freiburg (DE) KOSCHKER, Philipp 79108 Freiburg (DE) ANDRUSHKO, Vasyl 79108 Freiburg (DE) STOLZ, Florian 79108 Freiburg (DE) KANTOR, Mark 79108 Freiburg (DE) SCHMALZBAUER, Bjoern 79108 Freiburg (DE) (74) Representative: Meissner Bolte Partnerschaft mbB  Patentanwälte Rechtsanwälte Postfach 86 06 24 81633 München 81633 München (DE)