(19)

(11)

EP 0 546 017 A1

(12)

(43) Date of publication: 16.06.1993 Bulletin 1993/24 (21) Application number: 91915519.0 (22) Date of filing: 27.08.1991

(51) International Patent Classification (IPC):  A23K 1/ 16( . ) A23K 3/ 03( . ) A23K 1/ 165( . ) (86) International application number: PCT/GB1991/001438 (87) International publication number: WO 1992/003933 (19.03.1992 Gazette 1992/07)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IT LI LU NL SE (30) Priority: 31.08.1990 GB 19900019024 (71) Applicant: IMPERIAL CHEMICAL INDUSTRIES PLC London SW1P 3JF (GB)	(72) Inventors: WETHERALL, Jane Ann Rowland Gill, Tyne & Wear NE39 2HL (GB) ROOKE, John Andrew Aberdeen AB23 8ZL (GB) (74) Representative: Locke, Timothy John, et al  ICI Group Patents Services Dept. PO Box 6 Shire Park Bessemer Road Welwyn Garden City Herts, AL7 1HD Welwyn Garden City Herts, AL7 1HD (GB)