(19)

(11)

EP 0 970 171 A1

(12)

(43) Date of publication: 12.01.2000 Bulletin 2000/02 (21) Application number: 98905572.8 (22) Date of filing: 16.03.1998

(51) International Patent Classification (IPC)7: C11D 3/00, C11D 3/10, C11D 3/20 (86) International application number: PCT/IB9800/357 (87) International publication number: WO 9842/811 (01.10.1998 Gazette 1998/39)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI LU NL PT SE (30) Priority: 20.03.1997 GB 9706337 (71) Applicant: THE PROCTER & GAMBLE COMPANY Cincinnati,Ohio 45202 (US)	(72) Inventors: SORRIE, Graham, Alexander Northumberland NE61 3SH (GB) ASKEW, Stuart, Clive Newcastle upon Tyne NE2 3DN (GB) (74) Representative: Peet, Jillian Wendy et al Procter & Gamble Technical Centres Limited,Whitley Road,Longbenton Newcastle upon Tyne NE12 9TS Newcastle upon Tyne NE12 9TS (GB)