(19)

(11)

EP 3 720 656 A1

(12)

(43) Date of publication: 14.10.2020 Bulletin 2020/42 (21) Application number: 18886655.2 (22) Date of filing: 06.12.2018

(51) International Patent Classification (IPC):  B24D 3/28(2006.01) C09K 3/14(2006.01) B24D 3/14(2006.01) B24D 18/00(2006.01) (86) International application number: PCT/IB2018/059729 (87) International publication number: WO 2019/111210 (13.06.2019 Gazette 2019/24)

(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: 08.12.2017 US 201762596292 P (71) Applicant: 3M Innovative Properties Company St. Paul, MN 55133-3427 (US)	(72) Inventor: SCHILLO-ARMSTRONG, Melissa C. Saint Paul Minnesota 55133-3427 (US) (74) Representative: De Clercq & Partners  Edgard Gevaertdreef 10a 9830 Sint-Martens-Latem 9830 Sint-Martens-Latem (BE)