(19)
(11) EP 1 082 493 A1

(12)

(43) Date of publication:
14.03.2001 Bulletin 2001/11

(21) Application number: 99903105.7

(22) Date of filing: 15.01.1999
(51) International Patent Classification (IPC)7: D21H 17/45, D21H 21/10
(86) International application number:
PCT/US9900/869
(87) International publication number:
WO 0042/253 (20.07.2000 Gazette 2000/29)
(84) Designated Contracting States:
BE DE DK ES FI FR GB IT NL SE

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

(72) Inventors:
  • SHING, Jane, B., Wong
    Aurora, IL 60504 (US)
  • HURLOCK, John, R.
    Hickory Hills, IL 60457 (US)
  • MALTESH, Chidambaram
    Naperville, IL 60563 (US)
  • NAGARAJAN, Ramasubramanyam
    Naperville, IL 60563 (US)

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

   


(54) PAPERMAKING PROCESS UTILIZING HYDROPHILIC DISPERSION POLYMERS OF DIALLYLDIMETHYL AMMONIUM CHLORIDE AND ACRYLAMIDE AS RETENTION AND DRAINAGE AIDS