(19)

(11)

EP 0 755 427 A1

(12)

(43) Date of publication: 29.01.1997 Bulletin 1997/05 (21) Application number: 95915241.0 (22) Date of filing: 12.04.1995

(51) International Patent Classification (IPC):  C10M 169/ 04( . ) C10N 70/ 00( . ) C10N 40/ 24( . ) C10N 80/ 00( . ) (86) International application number: PCT/GB1995/000829 (87) International publication number: WO 1995/027767 (19.10.1995 Gazette 1995/45)

(84) Designated Contracting States: AT BE CH DE ES FR GB GR IT LI NL PT SE (30) Priority: 12.04.1994 EP 19940302557 (71) Applicant: ALCAN INTERNATIONAL LIMITED Montreal Quebec H3A 3G2 (CA)	(72) Inventors: CARR, Alan, Robert Daventry,Northamptonshire NN11 6SP (GB) SHEASBY, Peter, Geoffrey Banbury,Oxfordshire 0X15 4HS (GB) MARWICK, William, Francis Ilkley,West Yorkshire LS29 8QA (GB) (74) Representative: Pennant, Pyers, et al  Stevens, Hewlett & Perkins 1 Serjeants' Inn Fleet Street London EC4Y 1LL London EC4Y 1LL (GB)