Brevet : EP2159252 - PROCÉDÉ DE FABRICATION D'UNE PARTICULE POLYMÈRE GRANULÉE CONTENANT UN GROUPEMEN...

Titre

PROCÉDÉ DE FABRICATION D'UNE PARTICULE POLYMÈRE GRANULÉE CONTENANT UN GROUPEMENT CARBOXYLE ET PARTICULE POLYMÈRE GRANULÉE CONTENANT UN GROUPEMENT CARBOXYLE

N° et date de publication de la demande

EP2159252 - 03/03/2010

Type de la demande

A1

N° et date de dépôt

EP08777124.2 - 09/06/2008

N° et date de priorité

JP2007160831 - 19/06/2007

Famille de brevets

WO2008156003A1 ; JPWO2008156003A1 ; US2010159245A1 ; EP2159252A1 ; CN101688001A ; CA2690008A1 ; KR20100037608A ; BRPI0812513A2

Abrégé

An object of the present invention is to provide a method for easily producing granular carboxyl group-containing polymer particles which have a high bulk density and readily swell in water. The present invention provides a method for producing granular carboxyl group-containing polymer particles, which includes: producing carboxyl group-containing polymer particles; preparing an aggregate of the carboxyl group-containing polymer particles by allowing the carboxyl group-containing polymer particles to absorb an polar organic solvent to a liquid content of 5 to 25% by mass; and drying the aggregate of the carboxyl group-containing polymer particles and then grinding the dried aggregate.