(19)

(11)

EP 0 552 262 A1

(12)

(43) Date of publication: 28.07.1993 Bulletin 1993/30 (21) Application number: 91919265.0 (22) Date of filing: 08.10.1991

(51) International Patent Classification (IPC):  C09K 5/ 04( . ) C10M 105/ 44( . ) C10N 40/ 30( . ) C10M 105/ 42( . ) C10N 20/ 02( . ) (86) International application number: PCT/GB1991/001741 (87) International publication number: WO 1992/006147 (16.04.1992 Gazette 1992/09)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IT LI LU NL SE (30) Priority: 09.10.1990 GB 19900021921 (71) Applicant: IMPERIAL CHEMICAL INDUSTRIES PLC London SW1P 3JF (GB)

(72) Inventors: GOODWIN, Elizabeth Jane Middlesbrough, Cleveland TS9 6LA (GB) STEWART, Allan Guisborough, Cleveland TS 14 8JX (GB) RANDLES, Steven James Middlesbrough, Cleveland TS8 9DQ (GB) THOMPSON, Robert Ian George Cleveland TS10 2AP (GB) (74) Representative: Oldroyd, Alan, et al  Intellectual Property Department ICI Chemicals & Polymers Ltd P.O. Box 11 The Heath Runcorn Cheshire WA7 4QE Runcorn Cheshire WA7 4QE (GB)