(19)

(11)

EP 0 929 633 A1

(12)

(43) Date of publication: 21.07.1999 Bulletin 1999/29 (21) Application number: 97943877.0 (22) Date of filing: 16.09.1997

(51) International Patent Classification (IPC):  C11D 3/ 20( . ) C11D 3/ 37( . ) (86) International application number: PCT/EP1997/005175 (87) International publication number: WO 1998/012294 (26.03.1998 Gazette 1998/12)

(84) Designated Contracting States: BE DE ES FR GB IT (30) Priority: 20.09.1996 GB 19960019682 (71) Applicants: UNILEVER PLC London EC4P 4BQ (GB) UNILEVER N.V. 3013 AL Rotterdam (NL)	(72) Inventor: BOLZONI, Giuseppe I-20070 San Rocco al Porto (IT) (74) Representative: Dekker, Enno E.J.  Unilever N.V. Patents Division P.O. Box 137 3130 AC Vlaardingen 3130 AC Vlaardingen (NL)