Global Patent Index - EP 3124695 A1

EP 3124695 A1 20170201 - PROCESS FOR ENHANCING DRY STRENGTH OF PAPER BY TREATMENT WITH VINYLAMINE-CONTAINING POLYMERS AND ACRYLAMIDE- CONTAINING POLYMERS

Title (en)

PROCESS FOR ENHANCING DRY STRENGTH OF PAPER BY TREATMENT WITH VINYLAMINE-CONTAINING POLYMERS AND ACRYLAMIDE- CONTAINING POLYMERS

Title (de)

VERFAHREN ZUR ERHÖHUNG DER TROCKENFESTIGKEIT VON PAPIER DURCH BEHANDLUNG MIT VINYLAMINHALTIGEN POLYMEREN UND ACRYLAMIDHALTIGEN POLYMEREN

Title (fr)

PROCÉDÉ PERMETTANT D'AMÉLIORER LA RÉSISTANCE À SEC DU PAPIER PAR TRAITEMENT À L'AIDE DE POLYMÈRES À TENEUR EN VINYLAMINE ET DE POLYMÈRES CONTENANT DE L'ACRYLAMIDE

Publication

EP 3124695 A1 20170201 (EN)

Application

EP 16189885 A 20101222

Priority

  • US 29067009 P 20091229
  • EP 10799243 A 20101222

Abstract (en)

The present invention provides a process for the production of paper, board, and cardboard with enhanced dry strength, and paper product produced by the process. The process comprises adding to the wet end of a paper machine (a) a vinylamine-containing aqueous solution polymer having a molecular weight of from 75,000 daltons to 750,000 daltons and (b) a cationic acrylamide-containing aqueous solution polymer, wherein the polymer is made by way of aqueous dispersion polymerization and has a molecular weight of from 300,000 daltons to 1,500,000 daltons, and wherein the amount of cationic monomers incorporated into the acrylamide-containing polymer comprises from 5 % to 50 % on a molar basis of all the monomers incorporated into the acrylamide-containing polymer.

IPC 8 full level

D21H 21/18 (2006.01); D21H 17/37 (2006.01); D21H 17/45 (2006.01); D21H 17/56 (2006.01)

CPC (source: EP KR US)

D21H 17/35 (2013.01 - KR); D21H 17/37 (2013.01 - KR); D21H 17/375 (2013.01 - KR); D21H 17/56 (2013.01 - KR); D21H 21/14 (2013.01 - KR); D21H 21/18 (2013.01 - EP KR US); D21H 17/35 (2013.01 - EP US); D21H 17/37 (2013.01 - EP US); D21H 17/375 (2013.01 - EP US); D21H 17/56 (2013.01 - EP US)

Citation (applicant)

Citation (search report)

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

DOCDB simple family (publication)

US 2011155339 A1 20110630; AU 2010343125 A1 20120621; AU 2010343125 B2 20141016; BR 112012015966 A2 20160419; BR 112012015966 B1 20200512; CA 2780597 A1 20110728; CA 2780597 C 20170404; CN 102713059 A 20121003; CN 102713059 B 20150902; CN 105040517 A 20151111; EP 2519692 A1 20121107; EP 2519692 B1 20170315; EP 3124695 A1 20170201; ES 2625625 T3 20170720; JP 2013515877 A 20130509; JP 6050122 B2 20161227; KR 20120124398 A 20121113; MX 2012006403 A 20120710; PL 2519692 T3 20170831; PT 2519692 T 20170424; TW 201137201 A 20111101; TW I506182 B 20151101; WO 2011090672 A1 20110728; ZA 201205691 B 20140129

DOCDB simple family (application)

US 97544110 A 20101222; AU 2010343125 A 20101222; BR 112012015966 A 20101222; CA 2780597 A 20101222; CN 201080059943 A 20101222; CN 201510471542 A 20101222; EP 10799243 A 20101222; EP 16189885 A 20101222; ES 10799243 T 20101222; JP 2012547151 A 20101222; KR 20127016776 A 20101222; MX 2012006403 A 20101222; PL 10799243 T 20101222; PT 10799243 T 20101222; TW 99146428 A 20101228; US 2010061750 W 20101222; ZA 201205691 A 20120727