(19)

(11)

EP 1 086 150 A1

(12)

(43) Date of publication: 28.03.2001 Bulletin 2001/13 (21) Application number: 99921021.4 (22) Date of filing: 12.05.1999

(51) International Patent Classification (IPC)7: C08F 8/12, C08F 8/14, C08F 8/30, C08F 8/44, C10L 1/22, C10M 149/06, C10M 149/10 (86) International application number: PCT/GB9901/495 (87) International publication number: WO 9958/580 (18.11.1999 Gazette 1999/46)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 14.05.1998 GB 9810370 (71) Applicant: BP Chemicals Limited London EC2M 7BA (GB)	(72) Inventors: HANDA, Sheetal Middlesex UB1 2TQ (GB) HODGSON, Philip Kenneth Gordon,Farley Cottage Walton-on-ThamesSurrey KT12 1EL (GB) (74) Representative: Wilson, Michael John  BP International Limited,Group Patents & Agreements,Chertsey Road Sunbury on Thames,Middlesex TW16 7LN Sunbury on Thames,Middlesex TW16 7LN (GB)