Global Patent Index - EP 2839076 A4

EP 2839076 A4 20151021 - CONTROLLABLE FILLER PREFLOCULATION USING A DUAL POLYMER SYSTEM

Title (en)

CONTROLLABLE FILLER PREFLOCULATION USING A DUAL POLYMER SYSTEM

Title (de)

STEUERBARE FÜLLERVORFLOCKUNG ANHAND EINES DOPPELPOLYMERSYSTEMS

Title (fr)

PRÉ-FLOCULATION RÉGLABLE D'UNE CHARGE AU MOYEN D'UN SYSTÈME À DEUX POLYMÈRES

Publication

EP 2839076 A4 (EN)

Application

EP 13778531 A

Priority

  • US 201213449888 A
  • US 2013037048 W

Abstract (en)

[origin: WO2013158811A1] A method of preparing a stable dispersion of flocculated filler particles for use in papermaking processes comprises sequential addition of a first flocculating agent to an aqueous dispersion of filler particles followed by shearing of the dispersion, followed by addition of a second flocculating agent to the dispersion and further shearing of the resultant filler flocs to the desired particle size resulting in shear resistant filler flocs with a defined and controllable size distribution. In addition, a neutralizing coagulant can be added to the dispersion to partially or completely neutralize the charge of the filler before the first flocculating agent is added.

IPC 8 full level

D21H 21/00 (2006.01); D21H 17/00 (2006.01); D21H 17/37 (2006.01); D21H 17/45 (2006.01); D21H 17/63 (2006.01); D21H 17/67 (2006.01); D21H 17/68 (2006.01); D21H 21/06 (2006.01); D21H 21/10 (2006.01); D21H 21/18 (2006.01)

CPC (source: EP)

D21H 17/375 (2013.01); D21H 17/45 (2013.01); D21H 17/455 (2013.01); D21H 17/675 (2013.01); D21H 17/68 (2013.01); D21H 17/71 (2013.01); D21H 17/72 (2013.01); D21H 17/74 (2013.01); D21H 21/00 (2013.01); D21H 21/06 (2013.01); D21H 21/10 (2013.01); D21H 21/18 (2013.01)

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)

WO 2013158811 A1 20131024; CA 2867598 A1 20131024; CN 104271836 A 20150107; EP 2839076 A1 20150225; EP 2839076 A4 20151021; JP 2015520805 A 20150723; KR 20150008125 A 20150121

DOCDB simple family (application)

US 2013037048 W 20130418; CA 2867598 A 20130418; CN 201380019024 A 20130418; EP 13778531 A 20130418; JP 2015507159 A 20130418; KR 20147032189 A 20130418