EP 3234259 A1 20171025 - METHOD FOR PRODUCING PAPER AND CARDBOARD
Title (en)
METHOD FOR PRODUCING PAPER AND CARDBOARD
Title (de)
VERFAHREN ZUR HERSTELLUNG VON PAPIER UND KARTON
Title (fr)
PROCÉDÉ DE FABRICATION DE PAPIER ET DE CARTON
Publication
Application
Priority
- EP 14198341 A 20141216
- EP 2015078645 W 20151204
Abstract (en)
[origin: WO2016096477A1] The invention relates to a method for producing paper or cardboard, which comprises adding (I) an aqueous composition having a pH ≤6 and (II) at least one water-soluble polymeric anionic compound to a paper stock having a pH in the range from 6 to 8, and then dewatering the paper stock, forming sheets and drying, where the aqueous composition comprises (a) polymers having primary amino groups and/or amidine groups, with a total content of these groups of ≥1.5 meq/g polymer, and (b) 0.01 to 50 mol% of 1,4-cyclohexanedione (b), based on the total amount of primary amino groups and/or amidine groups in the polymers, and also to the paper or cardboard produced accordingly.
IPC 8 full level
D21H 17/34 (2006.01); B01F 23/80 (2022.01); C08L 39/02 (2006.01); D21H 17/37 (2006.01); D21H 17/41 (2006.01); D21H 17/42 (2006.01); D21H 17/44 (2006.01); D21H 21/10 (2006.01); D21H 23/04 (2006.01)
CPC (source: CN EP US)
B01F 23/511 (2022.01 - US); B01F 23/804 (2022.01 - US); C09D 139/02 (2013.01 - EP US); D21H 15/10 (2013.01 - US); D21H 17/34 (2013.01 - CN EP US); D21H 17/35 (2013.01 - US); D21H 17/37 (2013.01 - CN EP US); D21H 17/375 (2013.01 - US); D21H 17/41 (2013.01 - CN EP US); D21H 17/42 (2013.01 - CN EP US); D21H 17/44 (2013.01 - CN EP US); D21H 17/63 (2013.01 - US); D21H 21/10 (2013.01 - CN EP US); D21H 23/04 (2013.01 - CN EP US); D21H 25/04 (2013.01 - US); B01F 2101/47 (2022.01 - US); C08L 2201/54 (2013.01 - EP US); D21H 11/04 (2013.01 - US); D21H 11/08 (2013.01 - US)
Citation (search report)
See references of WO 2016096477A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
WO 2016096477 A1 20160623; CN 107223171 A 20170929; EP 3234259 A1 20171025; US 2017362776 A1 20171221
DOCDB simple family (application)
EP 2015078645 W 20151204; CN 201580076207 A 20151204; EP 15820441 A 20151204; US 201515536552 A 20151204