(19)

(11)

EP 0 417 116 A1

(12)

(43) Date of publication: 20.03.1991 Bulletin 1991/12 (21) Application number: 89904390.0 (22) Date of filing: 24.03.1989

(51) International Patent Classification (IPC):  C11D 10/ 02( . ) C11D 17/ 04( . ) C11D 17/ 00( . ) (86) International application number: PCT/US1989/001240 (87) International publication number: WO 1989/011753 (30.11.1989 Gazette 1989/28)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 27.05.1988 US 19880200067 (71) Applicant: ECOLAB INCORPORATED Saint Paul, MN 55101 (US)	(72) Inventors: MORGANSON, Stephen, Allan Eagan, MN 55122 (US) HEILE, Bernard, J. Apple Valley, MN 55124 (US) ASHTON, Kim, Joseph Vadnais Heights, MN 55110 (US) (74) Representative: Eisenführ, Speiser & Partner  Martinistrasse 24 D-28195 Bremen D-28195 Bremen (DE)