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(11)

EP 2 989 127 A1

(12)

(43) Date of publication: 02.03.2016 Bulletin 2016/09 (21) Application number: 14726181.2 (22) Date of filing: 24.04.2014

(51) International Patent Classification (IPC):  C08B 15/02(2006.01) D21H 11/20(2006.01) C08B 15/04(2006.01) (86) International application number: PCT/FI2014/050295 (87) International publication number: WO 2014/174152 (30.10.2014 Gazette 2014/44)

(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: 25.04.2013 FI 20135423 (71) Applicant: UPM-Kymmene Corporation 00100 Helsinki (FI)	(72) Inventors: NUOPPONEN, Markus FI-00550 Helsinki (FI) KUUTTI, Lauri FI-02750 Espoo (FI) PAJARI, Heikki FI-00410 Helsinki (FI) PÄÄKKÖNEN, Timo FI-00530 Helsinki (FI) (74) Representative: Tampereen Patenttitoimisto Oy  Visiokatu 1 33720 Tampere 33720 Tampere (FI)