(19)

(11)

EP 0 906 384 A1

(12)

(43) Date of publication: 07.04.1999 Bulletin 1999/14 (21) Application number: 97925580.0 (22) Date of filing: 15.05.1997

(51) International Patent Classification (IPC):  C11D 1/ 62( . ) C11D 3/ 50( . ) (86) International application number: PCT/US1997/008234 (87) International publication number: WO 1997/045511 (04.12.1997 Gazette 1997/52)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI LU NL PT SE (30) Priority: 31.05.1996 GB 19960011322 (71) Applicant: THE PROCTER & GAMBLE COMPANY Cincinnati, Ohio 45202 (US)

(72) Inventors: DODD, Ian, Martin Newcastle upon Tyne NE12 0YW (GB) THOEN, Christiaan, Arthur Tyne & Wear NE30 3LT (GB) MOSS, Michael, Alan, John Northumberland NE43 7DZ (GB) CUNNINGHAM, Philip, Andrew Newcastle upon Tyne NE7 7YB (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)