(19)

(11)

EP 0 631 522 A1

(12)

(43) Date of publication: 04.01.1995 Bulletin 1995/01 (21) Application number: 93905578.0 (22) Date of filing: 12.03.1993

(51) International Patent Classification (IPC):  B01F 17/ 00( . ) B01J 13/ 00( . ) C08J 3/ 24( . ) C08L 27/ 06( . ) C08L 71/ 02( . ) B01F 17/ 52( . ) C08G 81/ 02( . ) C08L 25/ 00( . ) C08L 71/ 00( . ) (86) International application number: PCT/GB1993/000524 (87) International publication number: WO 1993/018851 (30.09.1993 Gazette 1993/24)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 16.03.1992 GB 19920005701 (71) Applicant: IMPERIAL CHEMICAL INDUSTRIES PLC London SW1P 3JF (GB)	(72) Inventor: DOBSON, Derrick Clifford Heywood, Lancashire OL10 2AX (GB) (74) Representative: Roberts, Jonathan Winstanley  Intellectual Property Department ICI Chemicals & Polymers Ltd P.O. Box 11 The Heath Runcorn Cheshire WA7 4QE Runcorn Cheshire WA7 4QE (GB)