(19)
(11) EP 1 137 600 A1

(12)

(43) Date of publication:
04.10.2001 Bulletin 2001/40

(21) Application number: 98960685.0

(22) Date of filing: 03.12.1998
(51) International Patent Classification (IPC)7: C02F 1/24, C02F 1/56
(86) International application number:
PCT/US9825/643
(87) International publication number:
WO 0032/519 (08.06.2000 Gazette 2000/23)
(84) Designated Contracting States:
AT BE DE DK ES FI FR GB IT NL PT SE

(71) Applicant: NALCO CHEMICAL COMPANY
NapervilleIllinois 60563-1198 (US)

(72) Inventors:
  • SHING, Jane, Beryl, Wong
    Aurora, IL 60504 (US)
  • TUBERGEN, Karen
    Mt. Prospect, IL 60056 (US)

(74) Representative: Ebner von Eschenbach, Jennifer et al
Ladas & Parry,Dachauerstrasse 37
80335 München
80335 München (DE)

   


(54) HYDROPHILIC DISPERSION POLYMERS OF DIALLYLDIMETHYL AMMONIUM CHLORIDE AND ACRYLAMIDE FOR THE CLARIFICATION OF DEINKING PROCESS WATERS