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EP 4 126 782 A1

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(43) Date of publication: 08.02.2023 Bulletin 2023/06 (21) Application number: 20717173.7 (22) Date of filing: 03.04.2020

(51) International Patent Classification (IPC):  C03C 25/10(2000.01) D04H 1/587(2012.01) D04H 1/4209(2012.01) D04H 1/64(1968.09) (52) Cooperative Patent Classification (CPC): A01G 24/18; D04H 1/4209; D04H 1/587; D04H 1/64; C03C 25/26 (86) International application number: PCT/EP2020/059653 (87) International publication number: WO 2021/197631 (07.10.2021 Gazette 2021/40)

(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 (71) Applicant: ROCKWOOL A/S 2640 Hedehusene (DK)	(72) Inventors: JANSSEN, Frank Hendrikus Peter 2640 Hedehusene (DK) JOHANSSON, Dorte Bartnik 2640 Hedehusene (DK) NIKOLIC, Miroslav 2640 Hedehusene (DK) (74) Representative: Gill Jennings & Every LLP  The Broadgate Tower 20 Primrose Street London EC2A 2ES London EC2A 2ES (GB)