(19)

(11)

EP 0 374 229 A1

(12)

(43) Date of publication: 27.06.1990 Bulletin 1990/26 (21) Application number: 89906113.0 (22) Date of filing: 12.05.1989

(51) International Patent Classification (IPC):  B01F 17/ 00( . ) C09K 8/ 36( . ) (86) International application number: PCT/EP1989/000522 (87) International publication number: WO 1989/011516 (30.11.1989 Gazette 1989/28)

(84) Designated Contracting States: CH DE FR GB IT LI SE (30) Priority: 16.05.1988 GB 19880011574 (71) Applicants: SANDOZ-PATENT-GMBH D-79539 Lörrach (DE) SANDOZ AG CH-4002 Basel (CH)	(72) Inventors: COATES, Jacqueline, Anne Leeds LS6 2BB (GB) FARRAR, John, Martin Rawdon Leeds LS19 6RQ (GB) GRAHAM, Margaret, Helen Horsforth Leeds LS18 4PZ (GB)