(19)

(11)

EP 0 910 590 A1

(12)

(43) Date of publication: 28.04.1999 Bulletin 1999/17 (21) Application number: 97924115.0 (22) Date of filing: 28.05.1997

(51) International Patent Classification (IPC):  C08F 8/ 46( . ) C08F 8/ 32( . ) C08F 8/ 00( . ) C08F 10/ 04( . ) (86) International application number: PCT/GB1997/001447 (87) International publication number: WO 1997/047666 (18.12.1997 Gazette 1998/02)

(84) Designated Contracting States: BE DE FR GB IT (30) Priority: 10.06.1996 GB 19960012138 22.08.1996 GB 19960017615 04.10.1996 GB 19960020761 (71) Applicant: BP Chemicals Limited London EC2M 7BA (GB)	(72) Inventor: BLACKBOROW, John, Richard Edinburgh EH4 7BA (GB) (74) Representative: Krishnan, Suryanarayana Kalyana, et al  BP INTERNATIONAL LIMITED Patents & Agreements Division Chertsey Road Sunbury-on-Thames Middlesex TW16 7LN Sunbury-on-Thames Middlesex TW16 7LN (GB)