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(11)

EP 1 618 173 A1

(12)

(43) Date of publication: 25.01.2006 Bulletin 2006/04 (21) Application number: 04729132.3 (22) Date of filing: 23.04.2004

(51) International Patent Classification (IPC):  C10M 169/04(1985.01) C10M 173/00(1985.01) C10M 141/10(1985.01) (86) International application number: PCT/GB2004/001750 (87) International publication number: WO 2004/096959 (11.11.2004 Gazette 2004/46)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR Designated Extension States: AL HR LT LV MK (30) Priority: 28.04.2003 GB 0309571 (71) Applicant: Great Lakes Chemical (Europe) GmbH 8500 Frauenfeld (CH)	(72) Inventor: PHILLIPS, William, David Cheshire SK12 1TB (GB) (74) Representative: Wibbelmann, Jobst  Wuesthoff & Wuesthoff, Patent- und Rechtsanwälte, Schweigerstrasse 2 81541 München 81541 München (DE)