(19)

(11)

EP 4 196 745 A1

(12)

(43) Date of publication: 21.06.2023 Bulletin 2023/25 (21) Application number: 21746058.3 (22) Date of filing: 23.07.2021

(51) International Patent Classification (IPC):  G01B 11/25(2006.01) G01B 17/06(2006.01) B29C 44/46(2006.01) G01N 21/89(2006.01) G01N 29/44(2006.01) B29C 44/60(2006.01) G01N 29/04(2006.01) G01N 29/265(2006.01) B29B 7/94(2006.01) G01N 21/84(2006.01) G01B 11/245(2006.01) B29B 7/74(2006.01) C08G 18/00(2006.01) G01N 21/892(2006.01) B29C 44/28(2006.01) C08L 75/04(2006.01) G01N 29/06(2006.01) B29B 7/72(2006.01) B29K 75/00(2006.01) (52) Cooperative Patent Classification (CPC): G01B 11/2522; G01B 11/245; G01B 17/06; B29C 44/467; G01N 21/8914; G01N 29/4481; B29B 7/726; B29B 7/7404; B29B 7/94; B29C 44/28; B29C 44/60; B29K 2075/00; C08G 2110/0008; C08G 2110/0083; C08L 75/04; G01N 21/8901; G01N 29/041; G01N 29/0654; G01N 29/265; G01N 2021/845; G01N 2021/8908 (86) International application number: PCT/EP2021/070647 (87) International publication number: WO 2022/033837 (17.02.2022 Gazette 2022/07)

(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: 11.08.2020 CN 202010801935 12.11.2020 EP 20207120 (71) Applicant: Covestro Deutschland AG 51373 Leverkusen (DE)	(72) Inventors: GAO, Jianwu Shanghai 201901 (CN) ZHANG, Jun Shanghai, 201318 (CN) (74) Representative: Levpat  c/o Covestro AG Gebäude K12 51365 Leverkusen 51365 Leverkusen (DE)