Mitsubishi Chemical Corporation

Yuqing Xu

Noriaki Takahashi

Osamu Ando

Kazuo Mitsuhashi

Tomoko Ishikawa

Tomohiro Yamazaki

Masahiro Nukui

Toyomasa Hoshino

Hideko Akai

Tetsuharu Yuge

Kazunori Maruyama

Katsuo Koizumi

Takashi Kokubo

Tomohiko Tokunaga

Provided is a continuous reaction apparatus which can precisely control the path of flow of the liquid reaction mixture in the reaction vessel. Further, provided is a continuous reaction apparatus which can efficiently mix the liquid reaction mixture in the reaction vessel. The continuous reaction apparatus comprises a plurality of mixing vessel units and a plurality of partition units. These units are connected in the state of being alternately stacked on one another. Each mixing vessel unit has an agitating blade disposed in the inner space thereof. The relationship between the inner diameter Dof the mixing vessel unit, the height H of the mixing vessel unit, and the outer diameter dof the agitating blade satisfies the formula (1): 10&#x2265;(D/H)&#x2265;1.5, and the formula (2): 0.99&#x2265;(d/D)&#x2265;0.7. The agitating blade is a circular disc-type agitating blade.

Continuous reaction apparatus and apparatus for producing a toner

A toner for developing an electrostatic charge image, which satisfies both low temperature fixing property and blocking resistance and which is excellent in the fixed image strength and further excellent in the production stability and is capable of presenting a constant quality, and a process for its production, which toner comprises a binder resin containing a crystalline resin, and wax, and which has, in its DSC curve measured by a differential scanning calorimeter, an endothermic peak of from 0.01 to 10 mJ/mg at a temperature of at most 45&#xb0; C. during its temperature rise.

Toner for developing electrostatic charge image and process for its production

A toner for the development of an electrostatic image is provided wherein at least one layer of a particulate resin is coated onto a substantial portion of the surface of an agglomerate of particles made from at least primary polymer particles and primary colorant particles, wherein at least one of the primary polymer particles and the particulate resin contains a wax, and the particulate resin of the outermost layer is substantially free of wax and a process for producing the toner.

Toner for the development of electrostatic image and the production process thereof

A process for producing a toner for developing electrostatic image is described, which involves an agglomerate step wherein a dispersion liquid containing at least primary polymer particles and colorant particles is stirred in a stirring tank to agglomerate the particles to thereby obtain agglomerate of the particles and an aging step wherein the resultant agglomerate of the particles is kept at a temperature higher than the glass transition temperature (Tg) of the primary polymer particles by 10&deg; C. or more for a predetermined period of time to thereby fuse the particles, which process is characterized in that the concentration of solid content (C1) in the agglomerate step is 10 to 40% by weight, and that the concentration of the solid content (C2) in the aging step is in the range of 0.3C1&lE;C2&lE;0.8C1.

Process for producing toner for developing electrostatic image

A toner is provided for the development of an electrostatic image which includes an agglomerate of particles obtained by agglomerating at least primary polymer particles and primary colorant particles, wherein the toner has a THF insoluble content of from 15% to 80% and the toner further includes a wax having a melting point of 30 to 100&deg; C., and the method for producing the same.

Toner for the development of electrostatic image and method for producing the same

The present invention provides a process for the preparation of a novel toner satisfying a high resolution, a low temperature fixability and a high offset resistance at a low cost. A novel toner for the development of an electrostatic image is provided comprising an agglomerate of particles containing at least primary polymer particles, wherein said primary polymer particles substantially comprise a wax encapsulated therein.

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Kanagawa, Japan

Yuqing Xu