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EP 3 962 983 A1

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(43) Date of publication: 09.03.2022 Bulletin 2022/10 (21) Application number: 20720065.0 (22) Date of filing: 24.04.2020

(51) International Patent Classification (IPC):  C08G 18/79(2006.01) C08G 18/18(2006.01) C08G 18/42(2006.01) C08G 18/40(2006.01) C07D 251/34(2006.01) C08G 18/02(2006.01) C08G 18/76(2006.01) C08G 18/16(2006.01) C08G 18/44(2006.01) C08G 18/48(2006.01) C08G 101/00(2006.01) (52) Cooperative Patent Classification (CPC): C08G 18/40; C07D 251/32; C08G 18/7664; C08G 18/168; C08G 18/794; C08G 18/022; C08G 2110/0025; C08G 2115/02 (86) International application number: PCT/EP2020/061428 (87) International publication number: WO 2020/221662 (05.11.2020 Gazette 2020/45)

(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: 29.04.2019 CN 201910359180 06.06.2019 EP 19178722 (71) Applicant: Covestro Intellectual Property GmbH & Co. KG 51373 Leverkusen (DE)	(72) Inventors: SUN, Guobin Shanghai 200135 (CN) SHI, Reginald Shanghai 201108 (CN) LI, Yi Qing Shanghai 201601 (CN) HAN, Xiaojun Shanghai 200237 (CN) GU, Yongming Shanghai 201208 (CN) KUBE, Christian 53721 Siegburg (DE) (74) Representative: Levpat  c/o Covestro AG Gebäude K12 51365 Leverkusen 51365 Leverkusen (DE)