(19)

(11)

EP 0 523 078 A1

(12)

(43) Date of publication: 20.01.1993 Bulletin 1993/03 (21) Application number: 91906130.0 (22) Date of filing: 07.03.1991

(51) International Patent Classification (IPC):  C09K 5/ 00( . ) C09K 5/ 08( . ) (86) International application number: PCT/GB1991/000368 (87) International publication number: WO 1991/013839 (19.09.1991 Gazette 1991/22)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IT LI LU NL SE (30) Priority: 07.03.1990 GB 19900005091 31.05.1990 GB 19900012142 15.11.1990 GB 19900024849 (71) Applicant: WILKINS, Paul Spiller Bath, Avon BA2 4RZ (GB)	(72) Inventor: WILKINS, Paul Spiller Bath, Avon BA2 4RZ (GB) (74) Representative: James, Michael John Gwynne, et al  Wynne-Jones, Lainé & James 22, Rodney Road Cheltenham Gloucestershire GL50 1JJ Cheltenham Gloucestershire GL50 1JJ (GB)