(19)

(11)

EP 0 502 860 A1

(12)

(43) Date of publication: 16.09.1992 Bulletin 1992/38 (21) Application number: 90916276.0 (22) Date of filing: 22.10.1990

(51) International Patent Classification (IPC):  C11D 3/ 22( . ) C11D 17/ 00( . ) C11D 3/ 37( . ) (86) International application number: PCT/EP1990/001791 (87) International publication number: WO 1991/008280 (13.06.1991 Gazette 1991/13)

(84) Designated Contracting States: CH DE ES FR GB IT LI NL SE (30) Priority: 01.12.1989 EP 19890203053 (71) Applicants: UNILEVER PLC London EC4P 4BQ (GB) UNILEVER N.V. NL-3000 DK Rotterdam (NL)	(72) Inventors: BUYTENHEK, Cornelis, Johannes NL-3131 Vlaardingen (NL) FRANKENA, Hidde NL-3134 VS Vlaardingen (NL) VAN DE PAS, Johannes, Cornelis NL-3136 CV Vlaardingen (NL) (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)