(19)

(11)

EP 0 566 718 A1

(12)

(43) Date of publication: 27.10.1993 Bulletin 1993/43 (21) Application number: 92922961.0 (22) Date of filing: 09.11.1992

(51) International Patent Classification (IPC):  C08K 5/ 1545( . ) C08K 5/ 527( . ) C08K 5/ 5393( . ) C08K 5/ 1575( . ) C08K 5/ 53( . ) C08L 23/ 10( . ) (86) International application number: PCT/EP1992/002572 (87) International publication number: WO 1993/010175 (27.05.1993 Gazette 1993/13)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB IT LI NL (30) Priority: 12.11.1991 GB 19910023976 (71) Applicant: F. HOFFMANN-LA ROCHE AG CH-4002 Basel (CH)	(72) Inventors: GMÜNDER, Michael CH-4106 Therwil (CH) HENMAN, Terence John Royston, Herst. SH8 6EA (GB) (74) Representative: Cottong, Norbert A., et al  Grenzacherstrasse 124 Postfach 3255 CH-4002 Basel CH-4002 Basel (CH)