(19)

(11)

EP 1 115 757 A1

(12)

(43) Date of publication: 18.07.2001 Bulletin 2001/29 (21) Application number: 99938079.3 (22) Date of filing: 11.08.1999

(51) International Patent Classification (IPC)7: C08F 8/42, C08G 81/02 (86) International application number: PCT/CA9900/731 (87) International publication number: WO 0009/577 (24.02.2000 Gazette 2000/08)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 14.08.1998 US 96650 P (71) Applicant: UNIVERSITY OF WATERLOO Waterloo,Ontario N2L 3G1 (CA)	(72) Inventors: TZOGANAKIS, Costas Kitchener, Ontario N2N 3C8 (CA) MALZ, Hauke D-49356 Diepholz (DE) (74) Representative: Smart, Peter John  W.H. BECK, GREENER & CO7 Stone BuildingsLincoln's Inn London WC2A 3SZ London WC2A 3SZ (GB)