(19)

(11)

EP 0 656 022 A1

(12)

(43) Date of publication: 07.06.1995 Bulletin 1995/23 (21) Application number: 93918041.0 (22) Date of filing: 17.08.1993

(51) International Patent Classification (IPC):  C08L 33/ 04( . ) C08L 75/ 04( . ) C09D 175/ 04( . ) C08L 75/ 00( . ) C09D 133/ 04( . ) (86) International application number: PCT/GB1993/001744 (87) International publication number: WO 1994/004587 (03.03.1994 Gazette 1994/06)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 19.08.1992 GB 19920017625 (71) Applicant: SMITH & NEPHEW RESEARCH LIMITED Helsington, York YO1 5DF (GB)	(72) Inventor: HEYS, Brian 1 Engleric Crawley End Chrishall Hertfordshire SG8 8QZ (GB) (74) Representative: Gilholm, Stephen Philip  Corporate Patents Department Smith & Nephew Group Research Centre York Science Park Heslington York YO1 5DF Heslington York YO1 5DF (GB)