Global Patent Index - EP 2626464 B1

EP 2626464 B1 20170322 - Composition for paper deacidification, process to obtain it and method for its application

Title (en)

Composition for paper deacidification, process to obtain it and method for its application

Title (de)

Zusammensetzung zur Papierentsäuerung, Verfahren zum Erhalten davon und Verfahren zu ihrer Anwendung

Title (fr)

Composition de désacidification de papier, procédé permettant de l'obtenir et son procédé d'application

Publication

EP 2626464 B1 20170322 (EN)

Application

EP 11464027 A 20111215

Priority

EP 11464027 A 20111215

Abstract (en)

[origin: EP2626464A1] This invention relates to a new chemical composition comprising nanoparticles of hydroxyapatite, suspended in solution of carboxymethyl cellulose (50% : 50%) in isopropylic alcohol as solvent, this composition being used for paper deacidification purposes, by the anihilating the paper acidity from pH = 4.5 to alkaline range pH = 7.2.

IPC 8 full level

D21H 17/26 (2006.01); D21H 17/67 (2006.01); D21H 19/38 (2006.01); D21H 19/52 (2006.01); D21H 25/18 (2006.01)

CPC (source: EP)

D21H 25/18 (2013.01)

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

DOCDB simple family (publication)

EP 2626464 A1 20130814; EP 2626464 B1 20170322

DOCDB simple family (application)

EP 11464027 A 20111215