(19)

(11)

EP 0 934 266 A1

(12)

(43) Date of publication: 11.08.1999 Bulletin 1999/32 (21) Application number: 97911222.0 (22) Date of filing: 09.10.1997

(51) International Patent Classification (IPC):  G02B 1/ 04( . ) C08L 69/ 00( . ) C07D 207/ 452( . ) C07D 207/ 44( . ) (86) International application number: PCT/EP1997/005674 (87) International publication number: WO 1998/017644 (30.04.1998 Gazette 1998/17)

(84) Designated Contracting States: DE FR GB (30) Priority: 23.10.1996 EP 19960202851 02.12.1996 US 19960031541P (71) Applicant: Akzo Nobel N.V. 6824 BM Arnhem (NL)	(72) Inventors: BOONSTRA, Tjerk, Oedse NL-6921 SK Duiven (NL) VAN OLDEN, David NL-6904 BJ Zevenaar (NL) WOUDENBERG, Richard, Herman NL-6662 JG Elst (NL) (74) Representative: Schalkwijk, Pieter Cornelis, et al  Akzo Nobel N.V., Intellectual Property Department (Dept. AIP), P.O. Box 9300 6800 SB Arnhem 6800 SB Arnhem (NL)