(19)

(11)

EP 0 654 073 A1

(12)

(43) Date of publication: 24.05.1995 Bulletin 1995/21 (21) Application number: 93916066.0 (22) Date of filing: 14.07.1993

(51) International Patent Classification (IPC):  C10M 161/ 00( . ) C10M 141/ 06( . ) C10M 173/ 02( . ) C23F 11/ 10( . ) C10M 111/ 02( . ) C10M 173/ 00( . ) C23F 11/ 00( . ) C10N 30/ 12( . ) (86) International application number: PCT/GB1993/001473 (87) International publication number: WO 1994/003564 (17.02.1994 Gazette 1994/05)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 07.08.1992 GB 19920016776 (71) Applicant: IMPERIAL CHEMICAL INDUSTRIES PLC London SW1P 3JF (GB)	(72) Inventor: TURY, Bernard 8 Spring Vale Manchester M25 85E (GB) (74) Representative: Roberts, Jonathan Winstanley, et al  Intellectual Property Department ICI Chemicals & Polymers Ltd P.O. Box 11 The Heath Runcorn Cheshire WA7 4QE Runcorn Cheshire WA7 4QE (GB)