(19)

(11)

EP 0 491 723 A1

(12)

(43) Date of publication: 01.07.1992 Bulletin 1992/27 (21) Application number: 90912561.0 (22) Date of filing: 28.08.1990

(51) International Patent Classification (IPC):  C11D( . ) C11D 3/ 02( . ) C11D 3/ 20( . ) C11D 3/ 34( . ) C11D 3/ 395( . ) C11D 17/ 08( . ) C11D 3/ 18( . ) C11D 3/ 16( . ) C11D 3/ 24( . ) C11D 3/ 39( . ) C11D 17/ 00( . ) (86) International application number: PCT/EP1990/001461 (87) International publication number: WO 1991/004314 (04.04.1991 Gazette 1991/08)

(84) Designated Contracting States: CH DE ES FR GB IT LI NL SE (30) Priority: 13.09.1989 GB 19890020716 08.02.1990 EP 19900200290 27.06.1990 EP 19900201701 27.06.1990 WO 1990EP01046 (71) Applicants: UNILEVER PLC London EC4P 4BQ (GB) UNILEVER N.V. NL-3000 DK Rotterdam (NL)	(72) Inventors: BULFARI, Mario I-29100 Piacenza (IT) VAN DE PAS, Johannes, Cornelis NL-3136 CV Vlaardingen (NL) (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)