(19)

(11)

EP 1 425 438 A1

(12)

(43) Date of publication: 09.06.2004 Bulletin 2004/24 (21) Application number: 02760970.0 (22) Date of filing: 22.08.2002

(51) International Patent Classification (IPC)7: C25B 11/03, C25B 9/04, C25B 1/46 (86) International application number: PCT/SE2002/001508 (87) International publication number: WO 2003/023090 (20.03.2003 Gazette 2003/12)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR Designated Extension States: AL LT LV MK RO SI (30) Priority: 07.09.2001 EP 01850153 (71) Applicants: AKZO Nobel N.V. 6800 SB Arnhem (NL) Eka Chemicals AB 445 80 Bohus (SE) SE	(72) Inventor: SHIMAMUNE, Takayuki,Shimamune Consulting Office Machida-City, Tokyo 194-0022 (JP) (74) Representative: Jönsson, Christer  Eka Chemicals AB,Patent Department,Box 11556 100 61 Stockholm 100 61 Stockholm (SE)