(19)

(11)

EP 0 502 030 A1

(12)

(43) Date of publication: 09.09.1992 Bulletin 1992/37 (21) Application number: 90917177.0 (22) Date of filing: 23.11.1990

(51) International Patent Classification (IPC):  C11D 1/ 83( . ) C11D 3/ 06( . ) C11D 10/ 04( . ) C11D 1/ 02( . ) C11D 1/ 66( . ) C11D 3/ 04( . ) C11D 3/ 10( . ) C11D 17/ 00( . ) C11D 1/ 22( . ) C11D 1/ 72( . ) (86) International application number: PCT/GB1990/001815 (87) International publication number: WO 1991/008282 (13.06.1991 Gazette 1991/13)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IT LI NL SE (30) Priority: 24.11.1989 GB 19890026643 (71) Applicants: UNILEVER PLC London EC4P 4BQ (GB) UNILEVER N.V. NL-3013 AL Rotterdam (NL)	(72) Inventor: RABONE, Kenneth, Leslie 1 Ascot Drive Bebington Merseyside L63 2QP (GB) (74) Representative: Ford, Michael Frederick  MEWBURN ELLIS York House 23 Kingsway London WC2B 6HP London WC2B 6HP (GB)