EP 1819877 A1 20070822 - METHOD FOR PRODUCING HIGH DRY STRENGTH PAPER, PAPERBOARD OR CARDBOARD
Title (en)
METHOD FOR PRODUCING HIGH DRY STRENGTH PAPER, PAPERBOARD OR CARDBOARD
Title (de)
VERFAHREN ZUR HERSTELLUNG VON PAPIER, PAPPE UND KARTON MIT HOHER TROCKENFESTIGKEIT
Title (fr)
PROCEDE POUR PRODUIRE DU PAPIER, DU CARTON, DU CARTON BLANCHI PRESENTANT UNE RESISTANCE ELEVEE A SEC
Publication
Application
Priority
- EP 2005012429 W 20051121
- DE 102004056551 A 20041123
Abstract (en)
[origin: WO2006056381A1] The invention relates to a method for producing high dry strength paper, paperboard or cardboard by separately adding a vinyl amine unit-containing polymer and a polymeric anionic compound to a paper pulp, draining the paper pulp and drying the paper products. The inventive method is characterized by using at least one copolymer as the polymeric anionic compound which is obtained by copolymerizing (a) at least one N-propenoic acid amide of formula (I), wherein R<SUP>1</SUP>, R<SUP>2</SUP> = H or C<SUB>1</SUB> to C<SUB>6 </SUB>alkyl, (b) at least one acid group-containing monoethylenically unsaturated monomer and/or the alkali metal salts, alkaline earth metal salts or ammonium salts thereof and optionally (c) other monoethylenically unsaturated monomers, and optionally (d) compounds that comprise at least two ethylenically unsaturated double bonds in the molecule.
IPC 8 full level
D21H 21/18 (2006.01)
CPC (source: EP US)
D21H 21/18 (2013.01 - EP US); D21H 17/37 (2013.01 - EP US); D21H 17/55 (2013.01 - EP US); D21H 17/56 (2013.01 - EP US)
Citation (search report)
See references of WO 2006056381A1
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)
DE 102004056551 A1 20060524; BR PI0518485 A2 20081118; BR PI0518485 B1 20150804; CA 2586076 A1 20060601; CA 2586076 C 20160315; CN 101065538 A 20071031; CN 101065538 B 20111012; EP 1819877 A1 20070822; EP 1819877 B1 20130109; ES 2400189 T3 20130408; JP 2008520844 A 20080619; JP 4778521 B2 20110921; PL 1819877 T3 20130531; PT 1819877 E 20130312; US 2009145566 A1 20090611; US 8349134 B2 20130108; WO 2006056381 A1 20060601
DOCDB simple family (application)
DE 102004056551 A 20041123; BR PI0518485 A 20051121; CA 2586076 A 20051121; CN 200580040056 A 20051121; EP 05811227 A 20051121; EP 2005012429 W 20051121; ES 05811227 T 20051121; JP 2007541807 A 20051121; PL 05811227 T 20051121; PT 05811227 T 20051121; US 71982605 A 20051121