(19)

(11)

EP 0 330 692 A1

(12)

(43) Date of publication: 06.09.1989 Bulletin 1989/36 (21) Application number: 88907346.0 (22) Date of filing: 23.08.1988

(51) International Patent Classification (IPC):  A61L 9/ 01( . ) C08F 2/ 22( . ) A01N 25/ 18( . ) C08F 2/ 44( . ) (86) International application number: PCT/GB1988/000692 (87) International publication number: WO 1989/001948 (09.03.1989 Gazette 1989/06)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 24.08.1987 GB 19870019967 05.08.1988 GB 19880018664 (71) Applicant: ALLIED COLLOIDS LIMITED Bradford, West Yorkshire BD12 0JZ (GB)	(72) Inventors: CHAMBERLAIN, Peter Shipley West Yorkshire (GB) HAWE, Malcolm Huddersfield West Yorkshire (GB) (74) Representative: Lawrence, Peter Robin Broughton, et al  GILL JENNINGS & EVERY, Broadgate House, 7 Eldon Street London EC2M 7LH London EC2M 7LH (GB)