(19)
(11) EP 1 456 469 A1

(12)

(43) Date of publication:
15.09.2004 Bulletin 2004/38

(21) Application number: 02793739.0

(22) Date of filing: 20.12.2002
(51) International Patent Classification (IPC)7D21H 17/71, D21H 17/68, D21H 21/10
(86) International application number:
PCT/SE2002/002443
(87) International publication number:
WO 2003/056100 (10.07.2003 Gazette 2003/28)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SI SK TR
Designated Extension States:
AL LT LV MK RO

(30) Priority: 21.12.2001 EP 01850225

(71) Applicants:
  • Akzo Nobel N.V.
    6800 SB Arnhem (NL)
  • Eka Chemicals AB
    445 80 Bohus (SE)

    SE 

(72) Inventors:
  • NYANDER, Johan
    S-192 74 Sollentuna (SE)
  • JOHANSSON-VESTIN, Hans
    S-442 33 Kungälv (SE)
  • NORDIN, Jan
    S-862 32 Kvissleby (SE)
  • PAL, Annika, Viola
    S-433 51 Partille (SE)

(74) Representative: Jönsson, Christer 
Eka Chemicals AB,Patent Department,Box 11556
100 61 Stockholm
100 61 Stockholm (SE)

   


(54) AQUEOUS SILICA-CONTAINING COMPOSITION AND PROCESS FOR PRODUCTION OF PAPER