(19)

(11)

EP 0 506 700 A1

(12)

(43) Date of publication: 07.10.1992 Bulletin 1992/41 (21) Application number: 91900231.0 (22) Date of filing: 10.12.1990

(51) International Patent Classification (IPC):  C11D 3/ 22( . ) C11D 11/ 02( . ) C11D 3/ 37( . ) C11D 17/ 06( . ) (86) International application number: PCT/EP1990/002123 (87) International publication number: WO 1991/009932 (11.07.1991 Gazette 1991/15)

(84) Designated Contracting States: CH DE ES FR GB IT LI NL SE (30) Priority: 12.12.1989 GB 19890028023 (71) Applicants: UNILEVER PLC London EC4P 4BQ (GB) UNILEVER N.V. NL-3013 AL Rotterdam (NL)	(72) Inventors: MACHIN, David Birkenhead L43 6TJ (GB) VAN DE PAS, Johannes, Cornelis NL-3136 CV Vlaardingen (NL) PFLUGFELDER, Mark, Eric 7 Winfrith Close Spital Merseyside L63 9HY (GB) TAYLOR, Thomas 19 Chantry Avenue Cheshire CW8 1LZ (GB) (74) Representative: Kan, Jacob Hendrik, Dr., et al  Unilever N.V. Patent Division P.O. Box 137 NL-3130 AC Vlaardingen NL-3130 AC Vlaardingen (NL)