Treatment of deagglomerated particles with plasma-activated...

B - Operations – Transporting – 01 – J

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B01J 19/08 (2006.01) C09C 3/04 (2006.01) C09D 7/12 (2006.01)

Patent

CA 2244749

A method for treating the surface of substantially each deagglomerated particle of an array of easily agglomerated particles by contacting deagglomerated particles with a plasma-activated gas species and modifying the surfaces of the deagglomerated particles to aid subsequent incorporation of the particles into a matrix composition; the module for deagglomerating and dispersing the particles into the plasma-activated gas; the apparatus that comprises the deagglomeration module (322) and a reaction chamber (20) in which the particles are treated with the plasma-activated gas; the method for deagglomerating particles that may reagglomerate after plasma treatment; and a color composition containing plasma-treated pigment particles.

L'invention concerne un procédé de traitement de la surface de particules sensiblement désagglomérées d'un ensemble de particules facilement agglomérées, qui consiste à mettre en contact les particules désagglomérées avec un gaz activé au plasma et à modifier leur surface en vue de contribuer ultérieurement à leur incorporation dans une composition matricielle. On décrit par ailleurs le module utilisé pour désagglomérer et disperser les particules dans le gaz activé au plasma, un dispositif qui comprend à la fois ce module (322) et une chambre de réaction (20) utilisée pour le traitement des particules par gaz activé au plasma, le procédé relatif à la désagglomération des particules susceptibles d'être réagglomérées après le traitement au plasma, et, enfin, une composition de couleurs renfermant des particules de pigments ayant subi un traitement au plasma.

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