(19)

(11)

EP 0 407 496 A1

(12)

(43) Date of publication: 16.01.1991 Bulletin 1991/03 (21) Application number: 89911824.0 (22) Date of filing: 12.10.1989

(51) International Patent Classification (IPC):  C08J 3/ 00( . ) C08L 29/ 04( . ) C08J 3/ 12( . ) (86) International application number: PCT/GB1989/001209 (87) International publication number: WO 1990/003996 (19.04.1990 Gazette 1990/09)

(84) Designated Contracting States: BE DE FR GB IT NL (30) Priority: 12.10.1988 HU 19880005279 (71) Applicant: The British Petroleum Company p.l.c. London EC2Y 9BU (GB)	(72) Inventor: NAGY, Miklos, Joseph H-1113 Budapest (HU) (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)