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(11)

EP 3 071 719 A1

(12)

(43) Date of publication: 28.09.2016 Bulletin 2016/39 (21) Application number: 14863833.1 (22) Date of filing: 21.11.2014

(51) International Patent Classification (IPC):  C22B 59/00(2006.01) C22B 3/18(2006.01) B03C 1/015(2006.01) C01F 17/00(2006.01) C02F 101/10(2006.01) C22B 7/00(2006.01) B03C 1/00(2006.01) B03C 1/02(2006.01) C02F 1/48(2006.01) (86) International application number: PCT/FI2014/050891 (87) International publication number: WO 2015/075317 (28.05.2015 Gazette 2015/21)

(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: 22.11.2013 FI 20136167 (71) Applicant: Teknologian Tutkimuskeskus VTT OY 02150 Espoo (FI)	(72) Inventors: KOUKKARI, Pertti FI-02044 Vtt (FI) MÄKINEN, Jarno FI-02044 Vtt (FI) BOMBERG, Malin FI-02044 Vtt (FI) LEHTONEN, Anna FI-02044 Vtt (FI) ARNOLD, Mona FI-02044 Vtt (FI) (74) Representative: Seppo Laine Oy  Itämerenkatu 3 B 00180 Helsinki 00180 Helsinki (FI)