(19)

(11)

EP 0 985 002 A2

(12)

(88) Date of publication A3: 11.02.1999 (43) Date of publication: 15.03.2000 Bulletin 2000/11 (21) Application number: 98922978.6 (22) Date of filing: 27.05.1998

(51) International Patent Classification (IPC)7: C08L 73/00 (86) International application number: PCT/GB9801/532 (87) International publication number: WO 9854/261 (03.12.1998 Gazette 1998/48)

(84) Designated Contracting States: BE CH DE ES FR GB IT LI NL SE (30) Priority: 29.05.1997 GB 9711129 16.08.1997 GB 9717355 (71) Applicant: BP Chemicals Limited London EC2M 7BA (GB)	(72) Inventor: BONNER, James, Graham Edinburgh EH6 4RQ (GB) (74) Representative: Collins, Frances Mary et al BP International Limited,Group Patents and Agreements,Chertsey Road Sunbury-on-Thames,Middlesex TW16 7LN Sunbury-on-Thames,Middlesex TW16 7LN (GB)