(19)

(11)

EP 0 484 390 A1

(12)

(43) Date of publication: 13.05.1992 Bulletin 1992/20 (21) Application number: 90911307.0 (22) Date of filing: 20.07.1990

(51) International Patent Classification (IPC):  C07D 207/ 02( . ) C07D 307/ 54( . ) C07D 409/ 06( . ) C09B 23/ 00( . ) C09K 9/ 02( . ) C07D 307/ 02( . ) C07D 307/ 60( . ) C07D 409/ 14( . ) C09B 57/ 00( . ) G03C 1/ 73( . ) (86) International application number: PCT/GB1990/001118 (87) International publication number: WO 1991/001312 (07.02.1991 Gazette 1991/04)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB IT LI LU NL SE (30) Priority: 24.07.1989 GB 19890016860 (71) Applicant: MTM RESEARCH CHEMICALS LIMITED Yarm, Cleveland TS15 0JN (GB)	(72) Inventors: HELLER, Harry, George Cardiff (GB) WHITTALL, John Caerphilly (GB) (74) Representative: Ritter, Stephen David, et al  Mathys & Squire 100 Grays Inn Road London WC1X 8AL London WC1X 8AL (GB)