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(11)

EP 1 141 167 A1

(12)

(43) Date of publication: 10.10.2001 Bulletin 2001/41 (21) Application number: 99965203.5 (22) Date of filing: 10.12.1999

(51) International Patent Classification (IPC)7: C09K 7/06, C09K 7/02, H01B 3/20 (86) International application number: PCT/US9929/265 (87) International publication number: WO 0034/409 (15.06.2000 Gazette 2000/24)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE Designated Extension States: AL LT LV MK RO SI (30) Priority: 11.12.1998 GB 9827207 (71) Applicant: Great Lakes Chemical (Europe) GmbH 8500 Frauenfeld (CH)	(72) Inventors: HILL, Jonathan, Simon Manchester M41 5GR (GB) PHILLIPS, William, David StockportCheshire SK12 1TB (GB) (74) Representative: Atkinson, Peter Birch et al MARKS & CLERK,Sussex House,83-85 Mosley Street Manchester M2 3LG Manchester M2 3LG (GB)