(19)

(11)

EP 0 600 064 A1

(12)

(43) Date of publication: 08.06.1994 Bulletin 1994/23 (21) Application number: 93912946.0 (22) Date of filing: 11.06.1993

(51) International Patent Classification (IPC):  C08F 20/ 36( . ) G02F 1/ 35( . ) G02F 1/ 361( . ) C08F 20/ 34( . ) G02F 1/ 355( . ) (86) International application number: PCT/EP1993/001476 (87) International publication number: WO 1994/000797 (06.01.1994 Gazette 1994/02)

(84) Designated Contracting States: CH DE FR GB IT LI NL (30) Priority: 19.06.1992 CH 19920001946 (71) Applicant: F. HOFFMANN-LA ROCHE AG CH-4002 Basel (CH)	(72) Inventors: HERR, Rolf-Peter D-7800 Freiburg (DE) SCHADT, Martin CH-4411 Seltisberg (CH) SCHMITT, Klaus D-7850 Lörrach (DE) (74) Representative: Kellenberger, Marcus, Dr., et al  Grenzacherstrasse 124 Postfach 3255 CH-4002 Basel CH-4002 Basel (CH)