Toner for electrostatic charge image development
A technology for electrostatic image development and toner, which is applied in the direction of developer, electrography, optics, etc., and can solve the problem of easy agglomeration of toner
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Embodiment 1
[0142]75 parts of styrene, 20 parts of n-butyl acrylate, 5 parts of cyclohexyl methacrylate, 0.2 parts of divinylbenzene, and 0.4 parts of polymethacrylate macromer (manufactured by Toa Gosei Chemical Co., Ltd., commercialized Name "AA6") polymerizable monomer, 7 parts of carbon black (manufactured by Mitsubishi Chemical Corporation, trade name "#25B"), 1 part of resin for charge control (manufactured by Fujikura Chemicals, trade name "FCA-626-NS") "; weight average molecular weight 24,000, glass transition temperature 60°C), 10 parts of pentaerythritol tetramyristate and 0.2 parts of tert-dodecyl mercaptan were dispersed with bead mills at room temperature (23°C) to prepare polymerizable monomers combination.
[0143] On the other hand, at room temperature, 9.5 parts of magnesium chloride was dissolved in 250 parts of ion-exchanged water, and an aqueous solution obtained by dissolving 5.8 parts of sodium hydroxide in 50 parts of ion-exchanged water was slowly added under stir...
Embodiment 2
[0149] In Example 1, colored particles and a toner were obtained in the same manner as in Example 1 except that 0.2 parts of t-dodecylmercaptan was changed to 0.4 parts to prepare a monomer composition. Table 1 shows the characteristics of the obtained colored particles, toner characteristics and image quality evaluation results.
Embodiment 3
[0151] In Example 2, the polymerizable monomer composition was prepared without using pentaerythritol tetramyristate, and 4 parts of 2,2'-azobis-(2,4-dimethylvaleronitrile) were changed to 6 parts , except that it was the same as in Example 2 to obtain colored particles and toner. Table 1 shows the obtained coloring particle characteristics, toner characteristics and image quality evaluation results.
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