(19)

(11)

EP 0 550 636 A1

(12)

(43) Date of publication: 14.07.1993 Bulletin 1993/28 (21) Application number: 91918093.0 (22) Date of filing: 25.09.1991

(51) International Patent Classification (IPC):  C11D( . ) C11D 1/ 65( . ) C11D 3/ 32( . ) C11D 1/ 20( . ) C11D 1/ 72( . ) C11D 1/ 90( . ) C11D 1/ 52( . ) C11D 1/ 66( . ) C11D 17/ 00( . ) C11D 1/ 29( . ) C11D 1/ 75( . ) C11D 1/ 92( . ) (86) International application number: PCT/US1991/006977 (87) International publication number: WO 1992/006171 (16.04.1992 Gazette 1992/09)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IT LI LU NL SE (30) Priority: 28.09.1990 GB 19900021217 (71) Applicant: THE PROCTER & GAMBLE COMPANY Cincinnati, Ohio 45202 (US)	(72) Inventors: DYET, Julie, Anne Gosforth Newcastle upon Tyne NE3 1AS (GB) FOLEY, Peter, Robert Newcastle upon Tyne NE3 1RX (GB) (74) Representative: Gibson, Tony Nicholas, et al  Procter & Gamble (NTC) Limited Whitley Road Longbenton Newcastle upon Tyne NE12 9TS Longbenton Newcastle upon Tyne NE12 9TS (GB)