(19)

(11)

EP 1 023 249 A1

(12)

(43) Date of publication: 02.08.2000 Bulletin 2000/31 (21) Application number: 98940473.6 (22) Date of filing: 03.09.1998

(51) International Patent Classification (IPC)7: C06C 7/00 (86) International application number: PCT/GB9802/652 (87) International publication number: WO 9914/171 (25.03.1999 Gazette 1999/12)

(84) Designated Contracting States: FI GB (30) Priority: 13.09.1997 GB 9719430 (71) Applicant: Royal Ordnance plc EuxtonChorleyLancashire PR7 6AD (GB)	(72) Inventor: SCOTT, Harold, ArthurRoyal Ordnance PLC EuxtonChorleyLancashire PR7 6AD (GB) (74) Representative: Wildman, David Brian et al Bae Systems,Group IP Department,Lancaster House, P.O. Box 87,Farnborough Aerospace Centre Farnborough,Hampshire GU14 6YU Farnborough,Hampshire GU14 6YU (GB)