(19)
(11) EP 3 645 790 A1

(12)

(43) Date of publication:
06.05.2020 Bulletin 2020/19

(21) Application number: 18740885.1

(22) Date of filing: 26.06.2018
(51) International Patent Classification (IPC): 
D21H 21/02(2006.01)
D21C 9/00(2006.01)
D21H 21/04(2006.01)
D21H 21/20(2006.01)
(86) International application number:
PCT/FI2018/050500
(87) International publication number:
WO 2019/002682 (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: 29.06.2017 US 201762527027 P
01.08.2017 FI 20175707

(71) Applicant: Kemira Oyj
00180 Helsinki (FI)

(72) Inventors:
  • ZOU, Yong
    Atlanta Georgia 30339 (US)
  • LUO, Yuping
    Johns Creek Georgia 30097 (US)
  • CASASÚS, Anna
    Alpharetta Georgia 30022 (US)

(74) Representative: Berggren Oy, Turku 
P.O. Box 99 Tykistökatu 2-4 B
20521 Turku
20521 Turku (FI)

   


(54) COMPOSITION, ITS USE AND METHOD FOR REMOVING AND PREVENTING WET STRENGTH RESINS FROM CONTAMINATING PAPERMAKING EQUIPMENT