(19)

(11)

EP 1 753 849 A2

(12)

(88) Date of publication A3: 18.05.2006 (43) Date of publication: 21.02.2007 Bulletin 2007/08 (21) Application number: 05746634.4 (22) Date of filing: 09.05.2005

(51) International Patent Classification (IPC):  C10M 163/00(2006.01) (86) International application number: PCT/US2005/015995 (87) International publication number: WO 2005/112575 (01.12.2005 Gazette 2005/48)

(84) Designated Contracting States: DE FR GB (30) Priority: 14.05.2004 US 571393 P (71) Applicant: The Lubrizol Corporation Wickliffe, Ohio 44092 (US)	(72) Inventors: COOK, Stephen Belper Derby DE56 1QN (GB) LEAHY, Richard Hessle East Yorkshire HU13 0PT (GB) MAYHEW, Alexandra Belper Derby DE56 1QN (GB) (74) Representative: Bradley, Josephine Mary  D Young & Co 120 Holborn GB-London EC1N 2DY GB-London EC1N 2DY (GB)