(19)

(11)

EP 0 498 806 A1

(12)

(43) Date of publication: 19.08.1992 Bulletin 1992/34 (21) Application number: 90914713.0 (22) Date of filing: 05.10.1990

(51) International Patent Classification (IPC):  C11D 3/ 37( . ) C11D 17/ 00( . ) (86) International application number: PCT/EP1990/001679 (87) International publication number: WO 1991/006622 (16.05.1991 Gazette 1991/11)

(84) Designated Contracting States: CH DE ES FR GB IT LI NL SE (30) Priority: 31.10.1989 GB 19890024479 (71) Applicants: UNILEVER PLC London EC4P 4BQ (GB) UNILEVER N.V. NL-3000 DK Rotterdam (NL)	(72) Inventors: PAS, Johannes Cornelis van de NL-3136 CV Vlaardingen (NL) SCHEPERS, Frederik, Jan Edgewater, NJ 07020 (US) (74) Representative: Joppe, Hermina L. P., et al  Unilever N.V. Patent Division P.O. Box 137 NL-3130 AC Vlaardingen NL-3130 AC Vlaardingen (NL)