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(11)

EP 4 267 641 A1

(12)

(43) Date of publication: 01.11.2023 Bulletin 2023/44 (21) Application number: 21839529.1 (22) Date of filing: 17.12.2021

(51) International Patent Classification (IPC):  C08G 18/38(2006.01) C08G 18/79(2006.01) C08G 18/72(2006.01) C09D 175/12(2006.01) (52) Cooperative Patent Classification (CPC): C08G 18/3821; C08G 18/3853; C08G 18/3865; C08G 18/3876; C08G 18/72; C08G 18/797; C09D 175/12 (86) International application number: PCT/EP2021/086427 (87) International publication number: WO 2022/136155 (30.06.2022 Gazette 2022/26)

(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 (30) Priority: 23.12.2020 CN 202011541617 08.03.2021 EP 21161312 (71) Applicant: Covestro Deutschland AG 51373 Leverkusen (DE)	(72) Inventors: XU, Fei Suzhou, Jiangsu Province 215127 (CN) ZHU, Deyong Shanghai, Xuhui District 200237 (CN) LI, Jinqi Shanghai, Pudong New District 201210 (CN) DENG, Yan Shanghai, Changning District 200050 (CN) (74) Representative: Levpat  c/o Covestro AG Gebäude K12 51365 Leverkusen 51365 Leverkusen (DE)