(19)

(11)

EP 0 897 388 A1

(12)

(43) Date of publication: 24.02.1999 Bulletin 1999/08 (21) Application number: 97919744.0 (22) Date of filing: 25.04.1997

(51) International Patent Classification (IPC):  C07B 61/ 00( . ) C07F 7/ 10( . ) C07F 17/ 00( . ) C08F 10/ 00( . ) C07F 7/ 08( . ) C07F 7/ 12( . ) C08F 4/ 64( . ) C08F 4/ 6192( . ) (86) International application number: PCT/NL1997/000224 (87) International publication number: WO 1997/042196 (13.11.1997 Gazette 1997/49)

(84) Designated Contracting States: DE FR GB IT NL (30) Priority: 03.05.1996 NL 19961003002 (71) Applicant: DSM N.V. 6411 TE Heerlen (NL)	(72) Inventors: GRUTER, Gerardus, Johannes, Maria NL-6217 LW Maastricht (NL) ARTS, Henricus, Johannes NL-6151 JD Sittard (NL) VAN BEEK, Johannes, Antonius, Maria Mountain View, CA 94043 (US)