Method for producing granulated carboxyl group-containing...

Details Method for producing granulated carboxyl group-containing... Method for producing granulated carboxyl group-containing...

C - Chemistry, Metallurgy

08

J

C08J 3/12 (2006.01)

Patent

CA 2690008

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.

L'invention concerne un procédé de fabrication simple d'une particule polymère granulée contenant un groupement carboxyle qui présente une densité apparente élevée et gonfle facilement avec de l'eau. L'invention concerne notamment un procédé de fabrication d'une particule polymère granulée contenant un groupement carboxyle qui est caractérisé en ce qu'il comprend une étape de fabrication d'une particule polymère contenant un groupement carboxyle, une étape de formation d'un agglomérat des particules polymères contenant un groupement carboxyle en faisant absorber un solvant organique polaire aux particules polymères contenant un groupement carboxyle de manière à ce que l'agglomérat ait une teneur en liquide de 5 à 25 % en masse et une étape de séchage, puis de pulvérisation de l'agglomérat des particules polymères contenant un groupement carboxyle.

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