(19)

(11)

EP 0 467 985 A1

(12)

(43) Date of publication: 29.01.1992 Bulletin 1992/05 (21) Application number: 90907223.0 (22) Date of filing: 11.04.1990

(51) International Patent Classification (IPC):  C11D 3/ 14( . ) C11D 17/ 00( . ) C11D 3/ 43( . ) (86) International application number: PCT/GB1990/000549 (87) International publication number: WO 1990/012082 (18.10.1990 Gazette 1990/24)

(84) Designated Contracting States: CH DE ES FR GB IT LI NL SE (30) Priority: 11.04.1989 GB 19890008105 03.11.1989 GB 19890024849 (71) Applicants: UNILEVER PLC London EC4P 4BQ (GB) UNILEVER N.V. NL-3013 AL Rotterdam (NL)	(72) Inventor: DAWSON, Peter, Leonard Chester CH2 1EA (GB) (74) Representative: Fransella, Mary Evelyn  Unilever PLC Patent Division Colworth House Sharnbrook Bedford MK44 1LQ Bedford MK44 1LQ (GB)