(19)

(11)

EP 0 646 165 A1

(12)

(43) Date of publication: 05.04.1995 Bulletin 1995/14 (21) Application number: 92904540.0 (22) Date of filing: 16.01.1992

(51) International Patent Classification (IPC):  C11D 1/ 02( . ) C11D 1/ 65( . ) C11D 3/ 12( . ) C11D 17/ 06( . ) C12N 15/ 56( . ) C11D 1/ 22( . ) C11D 1/ 62( . ) C11D 3/ 04( . ) C11D 3/ 386( . ) C12N 9/ 42( . ) C11D 1/ 14( . ) (86) International application number: PCT/US1992/000073 (87) International publication number: WO 1992/013054 (06.08.1992 Gazette 1992/21)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IT LI LU NL SE (30) Priority: 16.01.1991 EP 19910870006 (71) Applicant: THE PROCTER & GAMBLE COMPANY Cincinnati, Ohio 45202 (US)

(72) Inventors: PRETTY, Alastair, John 4 Whinbank Newcastle upon Tyne NE20 9HX (GB) HARGROVE, Robin, Scott 84C St. George's Terrace Newcastle upon Tyne NE2 2DL (GB) BAECK, Andre, Cesar B-2820 Bonheiden (BE) BUSH, Alfred B-2910 Londerzeel (BE) CONVENTS, Andre, Christian B-1831 Diegem (BE) BOUTIQUE, Jean-Pol B-5800 Gembloux (BE) (74) Representative: Canonici, Jean-Jacques, et al  Procter & Gamble European Technical Center N.V. Temselaan 100 B-1853 Strombeek-Bever B-1853 Strombeek-Bever (BE)