(19)

(11)

EP 3 645 470 A1

(12)

(43) Date of publication: 06.05.2020 Bulletin 2020/19 (21) Application number: 18822874.6 (22) Date of filing: 04.06.2018

(51) International Patent Classification (IPC):  C02F 5/12(2006.01) C23F 11/04(2006.01) C02F 5/14(2006.01) (86) International application number: PCT/US2018/035861 (87) International publication number: WO 2019/005429 (03.01.2019 Gazette 2019/01)

(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: 27.06.2017 US 201715634416 (71) Applicant: NCH Corporation Irving, Texas 75062 (US)	(72) Inventors: DREWNIAK, Marta Carrollton, TX 75007 (US) STEIMEL, Lyle, H. Flower Mound, TX 75022 (US) (74) Representative: Grünecker Patent- und Rechtsanwälte PartG mbB  Leopoldstraße 4 80802 München 80802 München (DE)