(19)

(11)

EP 2 389 425 A1

(12)

(43) Date of publication: 30.11.2011 Bulletin 2011/48 (21) Application number: 10733279.3 (22) Date of filing: 25.01.2010

(51) International Patent Classification (IPC):  C10F 5/02(2006.01) E21C 49/00(2006.01) (86) International application number: PCT/FI2010/050039 (87) International publication number: WO 2010/084250 (29.07.2010 Gazette 2010/30)

(84) Designated Contracting States: 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 SE SI SK SM TR (30) Priority: 23.01.2009 FI 20095056 (71) Applicant: VAPO OY 40100 Jyväskylä (FI)	(72) Inventors: MUTKA, Kari FI-40250 Jyväskylä (FI) NYRÖNEN, Timo FI-40270 Palokka (FI) (74) Representative: Helke, Kimmo Kalervo  Kespat Oy P.O. Box 601 40101 Jyväskylä 40101 Jyväskylä (FI)