(19)

(11)

EP 2 864 257 A1

(12)

(43) Date of publication: 29.04.2015 Bulletin 2015/18 (21) Application number: 13810049.0 (22) Date of filing: 26.06.2013

(51) International Patent Classification (IPC):  C02F 103/28(2006.01) C02F 11/12(2006.01) (86) International application number: PCT/FI2013/050704 (87) International publication number: WO 2014/001641 (03.01.2014 Gazette 2014/01)

(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 (30) Priority: 26.06.2012 FI 20125724 (71) Applicant: UPM-Kymmene Corporation 00100 Helsinki (FI)	(72) Inventor: PYKÄLÄINEN, Nina 53300 Lappeenranta (FI) (74) Representative: Papula Oy  P.O. Box 981 00101 Helsinki 00101 Helsinki (FI)