(19)

(11)

EP 0 830 634 A1

(12)

(43) Date of publication: 25.03.1998 Bulletin 1998/13 (21) Application number: 97907225.0 (22) Date of filing: 19.03.1997

(51) International Patent Classification (IPC):  C08F 18/ 04( . ) C08L 33/ 14( . ) G02F 1/ 1337( . ) C08L 31/ 02( . ) C08L 101/ 12( . ) (86) International application number: PCT/GB1997/000745 (87) International publication number: WO 1997/038349 (16.10.1997 Gazette 1997/44)

(84) Designated Contracting States: DE FR GB (30) Priority: 03.04.1996 GB 19960007059 (71) Applicant: The Secretary of State for Defence in Her Britannic Majesty's Government of The United Kingdom of Great Britain and Northern I Farnborough, Hants, GU14 0LX (GB)	(72) Inventors: HOLLINGSHURST, Julian Hull HU6 7RX (GB) GOODBY, John William Hull HU5 7RX (GB) SAGE, Ian Charles Malvern, Worcs WR14 3PS (GB) BRYAN-BROWN, Guy Peter Malvern, Worcs WR14 3PS (GB) (74) Representative: Skelton, Stephen Richard, et al  D/IPR DERA Formalities, Poplar 2a No. 19, MOD(PE) Abbey Wood Bristol BS34 8JH Bristol BS34 8JH (GB)