Toner aggregation processes

Details Toner aggregation processes Toner aggregation processes

G - Physics

03

G

G03G 9/08 (2006.01)

Patent

CA 2123352

A process for the preparation of toner compositions comprising: (i) preparing a pigment dispersion, which dispersion is comprised of a pigment, an ionic surfactant, and optionally a charge control agent; (ii) shearing said pigment dispersion with a latex or emulsion blend comprised of resin, a counterionic surfactant with a charge polarity of opposite sign to that of said ionic surfactant and a nonionic surfactant; (iii) heating the above sheared blend below about the glass transition temperature (Tg) of the resin, to form electrostatically bound toner size aggregates with a narrow particle size distribution; and (iv) heating said bound aggregates above about the Tg of the resin.

Procédé pour la préparation de compositions de toner. Il s'agit de : (i) préparer une dispersion de pigment constituée d'un pigment, d'un surfactant ionique et, facultativement, d'un agent régulateur de charges; (ii) cisailler la dispersion de pigment au moyen d'un latex ou d'une émulsion formée de résine, d'un surfactant à ions opposés, dont la polarité des charges de signes est opposée à celle du surfactant ionique, et d'un surfactant non ionique; (iii) chauffer le mélange cisaillé approximativement au-dessous de la température de transition vitreuse (Tg) de la résine pour former des agrégats à liaisons électrovalentes de la dimension requise pour un toner et présentant une faible distribution granulométrique; (iv) chauffer les agrégats approximativement au-dessus de la Tg de la résine.

Affiliated with

Also associated with

Rating

Toner aggregation processes does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Toner aggregation processes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Toner aggregation processes will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1752281