External additive for toner and method for producing the same

Details External additive for toner and method for producing the same External additive for toner and method for producing the same

G - Physics

03

G

G03G 9/08 (2006.01)

Patent

CA 2637913

A barium titanate external additive for toner that when blended in a toner, enhances especially the toner fluidity, electrical properties and other relevant performance, and that in a printer making use of the toner, simultaneously realizes high image density and reduced background fog and suppresses image defects, such as void and fading. Further, there is provided an industrially advantageous process for producing the same. The external additive for toner is characterized by consisting of a spherical barium titanate of 5.6 g/ml or less specific gravity.

L'invention concerne un additif externe à base de titanate de baryum pour toner, qui, lorsqu'il est mélangé à un toner, améliore particulièrement la fluidité, les propriétés électriques et autres performances importantes du toner, et qui, dans une imprimante utilisant le toner, permet d'obtenir simultanément une densité d'image élevée et un voile de fond réduit et permet de supprimer les défauts d'image, tel que le vide et la décoloration. L'invention concerne en outre un procédé industriellement avantageux de production dudit additif. L'additif externe pour toner est caractérisé en ce qu'il est constitué d'un titanate de baryum sphérique présentant une gravité spécifique inférieure ou égale à 5,6 g/ml.

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