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(11)

EP 4 359 362 A1

(12)

(43) Date of publication: 01.05.2024 Bulletin 2024/18 (21) Application number: 22737622.5 (22) Date of filing: 23.06.2022

(51) International Patent Classification (IPC):  C04B 35/043(2006.01) C04B 35/622(2006.01) C04B 41/52(2006.01) C04B 35/057(2006.01) C04B 35/66(2006.01) (52) Cooperative Patent Classification (CPC): C04B 35/057; C04B 35/66; C04B 35/043; C04B 2235/3208; C04B 2235/3206; C04B 2235/3272; C04B 2235/5472; C04B 2235/5436; C04B 2235/5427; C04B 2235/72; C04B 2235/728; C04B 2235/9615; C04B 2235/9669; C04B 35/62222 (86) International application number: PCT/EP2022/067280 (87) International publication number: WO 2022/269011 (29.12.2022 Gazette 2022/52)

(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: 23.06.2021 EP 21181288 (71) Applicant: Lhoist Recherche et Développement S.A. 1342 Ottignies-Louvain-la-Neuve (BE)	(72) Inventors: FIRSBACH, Felix Georg 1410 Waterloo (BE) HOULDWORTH, Ian Castle Cary, Somerset, BA7 7FJ (GB) CHUNLAMANI, Souliyann Brooklyn, NY 11201 (US) (74) Representative: Gevers Patents  De Kleetlaan 7A 1831 Diegem 1831 Diegem (BE)