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(11)

EP 0 883 630 A1

(12)

(43) Date of publication: 16.12.1998 Bulletin 1998/51 (21) Application number: 97905500.0 (22) Date of filing: 28.02.1997

(51) International Patent Classification (IPC):  C08B 15/ 02( . ) C08B 31/ 18( . ) (86) International application number: PCT/NL1997/000098 (87) International publication number: WO 1997/031951 (04.09.1997 Gazette 1997/38)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 29.02.1996 NL 19961002494 (71) Applicant: Kemira Chemicals B.V. 3180 AA Rozenburg (NL)

(72) Inventors: SIVASLIGIL, Dogan, Sahin NL-2525 KR Den Haag (NL) SLAGHEK, Theodoor, Maximiliaan NL-3042 HT Rotterdam (NL) DE WIT, Dirk NL-6721 ZK Bennekom (NL) GOTLIEB, Kornelis, Fester NL-9648 LC Wildervank (NL) JANSEN, Reinier, Joszef, Johannes 2316 ZT Leiden (NL) VAN OVEREEM, Hans 3317 MG Dordrecht (NL) (74) Representative: de Bruijn, Leendert C.  Nederlandsch Octrooibureau P.O. Box 29720 2502 LS Den Haag 2502 LS Den Haag (NL)