Global Patent Index - EP 2639350 A1

EP 2639350 A1 20130918 - Method for reducing negative effects of natural pitch contaminants in both pulping and papermaking operations

Title (en)

Method for reducing negative effects of natural pitch contaminants in both pulping and papermaking operations

Title (de)

Verfahren zur Verringerung der negativen Auswirkungen von natürlichen Harzverunreinigungen bei der Zellstoff- und Papierherstellung

Title (fr)

Procédé pour réduire les effets négatifs des contaminants naturels de pas dans des opérations de mise en pâte et de papier

Publication

EP 2639350 A1 20130918 (EN)

Application

EP 12001801 A 20120316

Priority

EP 12001801 A 20120316

Abstract (en)

The instant invention relates to a method for inhibiting pitch deposition on pulping and papermaking equipment or machinery comprising adding to a pulp slurry containing pitch an effective amount of polymer dispersion comprising a component A and a component B, wherein component A being a homopolymer and/or copolymer of acrylic acid and/or its alkyl esters, or methacrylic acid and/or its alkyl esters, styrene and/or methylstyrene, vinyl acetate, itaconic acid, glycidyl methacrylate, 2-hydroxyalkyl (meth)acrylate, methacrylamide, N-hydroxyethyl(meth)acrylamide, dimethacrylate monomers, 1,3-butylene glycol dimethacrylate, ethylene glycol dimethacrylate, diethylene glycol dimethacrylate, propylene glycol dimethacrylate, dipropylene glycol dimethacrylate, 4-methyl-1,4-pentanediol dimethacrylate, divinylbenzene and/or trivinylbenzene, and component B being an aqueous solution of a styrene copolymer with acrylic acid, maleimide and/or maleic anhydride.

IPC 8 full level

D21H 21/02 (2006.01); D21C 9/08 (2006.01); D21H 17/35 (2006.01); D21H 17/36 (2006.01); D21H 17/37 (2006.01)

CPC (source: EP US)

D21C 9/08 (2013.01 - EP US); D21H 17/37 (2013.01 - EP US); D21H 21/02 (2013.01 - EP US); D21H 17/36 (2013.01 - EP US)

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

Designated extension state (EPC)

BA ME

DOCDB simple family (publication)

EP 2639350 A1 20130918; EP 2639350 B1 20170222; BR 112014022440 B1 20210427; CA 2864955 A1 20130919; CA 2864955 C 20191224; ES 2625776 T3 20170720; PL 2639350 T3 20171031; PT 2639350 T 20170526; US 2015027652 A1 20150129; WO 2013135362 A1 20130919

DOCDB simple family (application)

EP 12001801 A 20120316; BR 112014022440 A 20130309; CA 2864955 A 20130309; EP 2013000703 W 20130309; ES 12001801 T 20120316; PL 12001801 T 20120316; PT 12001801 T 20120316; US 201314384747 A 20130309