EP 1977040 A2 20081008 - PAPERMAKING PROCESSES USING COAGULANTS AND OPTICAL BRIGHTENERS
Title (en)
PAPERMAKING PROCESSES USING COAGULANTS AND OPTICAL BRIGHTENERS
Title (de)
VERFAHREN ZUR HERSTELLUNG VON PAPIER ÜBER KOAGULANZIEN UND OPTISCHE AUFHELLER
Title (fr)
PROCÉDÉS DE FABRICATION DE PAPIER UTILISANT DES AGENTS COAGULANTS ET DES AZURANTS OPTIQUES
Publication
Application
Priority
- US 2007001806 W 20070124
- US 76191306 P 20060125
Abstract (en)
[origin: US2007169903A1] A method of making paper or paperboard is described, which includes introducing at least one charged starch, preferably having a degree of substitution greater than 0.045, and at least one optical brightening agent to a papermaking pulp and then forming the pulp into paper or paperboard. The present invention further describes methods of improving optical brightener performance.
IPC 8 full level
D21H 17/28 (2006.01); D21H 21/10 (2006.01); D21H 21/18 (2006.01); D21H 21/30 (2006.01)
CPC (source: EP US)
D21H 21/28 (2013.01 - EP US); D21H 21/30 (2013.01 - EP US); D21H 17/29 (2013.01 - EP US); D21H 23/04 (2013.01 - EP US); D21H 23/14 (2013.01 - EP US)
Citation (search report)
See references of WO 2007087320A2
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
US 2007169903 A1 20070726; AU 2007208302 A1 20070802; BR PI0706958 A2 20110412; CA 2637192 A1 20070802; CN 101375000 A 20090225; EP 1977040 A2 20081008; JP 2009524749 A 20090702; WO 2007087320 A2 20070802; WO 2007087320 A3 20070920; ZA 200805441 B 20090826
DOCDB simple family (application)
US 65730607 A 20070124; AU 2007208302 A 20070124; BR PI0706958 A 20070124; CA 2637192 A 20070124; CN 200780003510 A 20070124; EP 07716938 A 20070124; JP 2008552369 A 20070124; US 2007001806 W 20070124; ZA 200805441 A 20080623