(19)

(11)

EP 1 084 210 A1

(12)

(43) Date of publication: 21.03.2001 Bulletin 2001/12 (21) Application number: 99922308.4 (22) Date of filing: 14.05.1999

(51) International Patent Classification (IPC)7: C09K 21/14, H01B 7/34 (86) International application number: PCT/GB9901/529 (87) International publication number: WO 9960/074 (25.11.1999 Gazette 1999/47)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI NL PT SE (30) Priority: 15.05.1998 GB 9810529 (71) Applicant: PFC Surechem Limited Chessington,Surrey KT9 1TU (GB)	(72) Inventors: ASHLING, Geoffrey Edward Norwood Hill,Surrey RH6 0ET (GB) COULTER, Robert Glyn Broadstone,Dorset BH18 8LF (GB) (74) Representative: W.P. THOMPSON & CO.  Eastcheap HouseCentral Approach Letchworth,Hertfordshire SG6 3DS Letchworth,Hertfordshire SG6 3DS (GB)